/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:28:39,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:28:39,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:28:39,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:28:39,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:28:39,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:28:39,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:28:39,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:28:39,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:28:39,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:28:39,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:28:39,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:28:39,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:28:39,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:28:39,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:28:39,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:28:39,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:28:39,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:28:39,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:28:39,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:28:39,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:28:39,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:28:39,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:28:39,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:28:39,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:28:39,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:28:39,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:28:39,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:28:39,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:28:39,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:28:39,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:28:39,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:28:39,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:28:39,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:28:39,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:28:39,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:28:39,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:28:39,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:28:39,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:28:39,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:28:39,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:28:39,233 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 [2020-08-22 05:28:39,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:28:39,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:28:39,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:28:39,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:28:39,265 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:28:39,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:28:39,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:28:39,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:28:39,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:28:39,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:28:39,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:28:39,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:28:39,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:28:39,266 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:28:39,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:28:39,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:28:39,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:28:39,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:28:39,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:28:39,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:28:39,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:28:39,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:28:39,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:28:39,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:28:39,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:28:39,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:28:39,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:28:39,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:28:39,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:28:39,270 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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:28:39,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:28:39,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:28:39,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:28:39,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:28:39,604 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:28:39,605 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 05:28:39,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6540a7b6f/717f38b23ce24e3d9cf75f3755c4c890/FLAG3f4c20638 [2020-08-22 05:28:40,117 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:28:40,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 05:28:40,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6540a7b6f/717f38b23ce24e3d9cf75f3755c4c890/FLAG3f4c20638 [2020-08-22 05:28:40,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6540a7b6f/717f38b23ce24e3d9cf75f3755c4c890 [2020-08-22 05:28:40,542 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:28:40,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:28:40,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:28:40,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:28:40,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:28:40,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:40,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54de61ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40, skipping insertion in model container [2020-08-22 05:28:40,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:40,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:28:40,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:28:40,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:28:40,852 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:28:40,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:28:40,889 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:28:40,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40 WrapperNode [2020-08-22 05:28:40,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:28:40,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:28:40,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:28:40,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:28:40,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:40,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:40,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:40,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:40,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:41,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:41,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (1/1) ... [2020-08-22 05:28:41,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:28:41,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:28:41,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:28:41,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:28:41,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (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 [2020-08-22 05:28:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:28:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:28:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:28:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:28:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:28:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:28:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:28:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:28:41,370 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:28:41,371 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 05:28:41,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:28:41 BoogieIcfgContainer [2020-08-22 05:28:41,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:28:41,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:28:41,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:28:41,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:28:41,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:28:40" (1/3) ... [2020-08-22 05:28:41,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575f096f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:28:41, skipping insertion in model container [2020-08-22 05:28:41,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:40" (2/3) ... [2020-08-22 05:28:41,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575f096f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:28:41, skipping insertion in model container [2020-08-22 05:28:41,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:28:41" (3/3) ... [2020-08-22 05:28:41,385 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-22 05:28:41,398 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:28:41,405 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:28:41,435 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:28:41,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:28:41,485 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:28:41,485 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:28:41,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:28:41,485 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:28:41,486 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:28:41,486 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:28:41,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:28:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 05:28:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 05:28:41,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:41,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:41,514 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:41,519 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-22 05:28:41,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:41,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402048817] [2020-08-22 05:28:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:41,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:41,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402048817] [2020-08-22 05:28:41,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:41,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:41,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379421100] [2020-08-22 05:28:41,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:41,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:41,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:41,761 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-22 05:28:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:41,822 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-22 05:28:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:41,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 05:28:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:41,838 INFO L225 Difference]: With dead ends: 75 [2020-08-22 05:28:41,839 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 05:28:41,843 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 [2020-08-22 05:28:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 05:28:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-22 05:28:41,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 05:28:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-22 05:28:41,893 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-22 05:28:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:41,894 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-22 05:28:41,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-22 05:28:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 05:28:41,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:41,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:41,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:28:41,896 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:41,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-22 05:28:41,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:41,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165234758] [2020-08-22 05:28:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:41,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:41,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165234758] [2020-08-22 05:28:41,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:41,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:41,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683902109] [2020-08-22 05:28:41,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:41,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:41,970 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-22 05:28:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,004 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-22 05:28:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 05:28:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,008 INFO L225 Difference]: With dead ends: 97 [2020-08-22 05:28:42,008 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 05:28:42,010 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 [2020-08-22 05:28:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 05:28:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-22 05:28:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 05:28:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-22 05:28:42,025 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-22 05:28:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,025 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-22 05:28:42,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-22 05:28:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 05:28:42,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:42,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:28:42,028 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-22 05:28:42,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150724599] [2020-08-22 05:28:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150724599] [2020-08-22 05:28:42,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044965651] [2020-08-22 05:28:42,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,082 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-22 05:28:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,109 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-22 05:28:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 05:28:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,111 INFO L225 Difference]: With dead ends: 90 [2020-08-22 05:28:42,111 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 05:28:42,112 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 [2020-08-22 05:28:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 05:28:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 05:28:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 05:28:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-22 05:28:42,123 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-22 05:28:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,123 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-22 05:28:42,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-22 05:28:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 05:28:42,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:42,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:28:42,125 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,126 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-22 05:28:42,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92236835] [2020-08-22 05:28:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92236835] [2020-08-22 05:28:42,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478484086] [2020-08-22 05:28:42,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,174 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-22 05:28:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,210 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-22 05:28:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 05:28:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,212 INFO L225 Difference]: With dead ends: 112 [2020-08-22 05:28:42,213 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 05:28:42,213 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 [2020-08-22 05:28:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 05:28:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-22 05:28:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 05:28:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-22 05:28:42,225 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-22 05:28:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,226 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-22 05:28:42,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-22 05:28:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 05:28:42,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:42,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:28:42,228 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-22 05:28:42,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844408195] [2020-08-22 05:28:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844408195] [2020-08-22 05:28:42,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377352194] [2020-08-22 05:28:42,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,274 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-22 05:28:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,301 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-22 05:28:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 05:28:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,303 INFO L225 Difference]: With dead ends: 184 [2020-08-22 05:28:42,304 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 05:28:42,305 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 [2020-08-22 05:28:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 05:28:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-22 05:28:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-22 05:28:42,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-22 05:28:42,321 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-22 05:28:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,322 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-22 05:28:42,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-22 05:28:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 05:28:42,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,324 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] [2020-08-22 05:28:42,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:28:42,324 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,325 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-22 05:28:42,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634973343] [2020-08-22 05:28:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634973343] [2020-08-22 05:28:42,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106444763] [2020-08-22 05:28:42,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,365 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-22 05:28:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,387 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-22 05:28:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 05:28:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,390 INFO L225 Difference]: With dead ends: 165 [2020-08-22 05:28:42,390 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 05:28:42,391 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 [2020-08-22 05:28:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 05:28:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-22 05:28:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 05:28:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-22 05:28:42,401 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-22 05:28:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,401 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-22 05:28:42,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-22 05:28:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 05:28:42,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,403 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] [2020-08-22 05:28:42,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:28:42,404 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-22 05:28:42,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662874172] [2020-08-22 05:28:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662874172] [2020-08-22 05:28:42,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833562912] [2020-08-22 05:28:42,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,445 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-22 05:28:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,483 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-22 05:28:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 05:28:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,498 INFO L225 Difference]: With dead ends: 204 [2020-08-22 05:28:42,499 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 05:28:42,499 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 [2020-08-22 05:28:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 05:28:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-22 05:28:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 05:28:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-22 05:28:42,530 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-22 05:28:42,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,533 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-22 05:28:42,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,533 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-22 05:28:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 05:28:42,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,535 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] [2020-08-22 05:28:42,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:28:42,536 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-22 05:28:42,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691784440] [2020-08-22 05:28:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691784440] [2020-08-22 05:28:42,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556069260] [2020-08-22 05:28:42,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,602 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-22 05:28:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,623 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-22 05:28:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 05:28:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,625 INFO L225 Difference]: With dead ends: 352 [2020-08-22 05:28:42,625 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 05:28:42,627 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 [2020-08-22 05:28:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 05:28:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-22 05:28:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-22 05:28:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-22 05:28:42,642 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-22 05:28:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,643 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-22 05:28:42,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-22 05:28:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 05:28:42,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,645 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] [2020-08-22 05:28:42,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:28:42,646 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,646 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-22 05:28:42,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29614103] [2020-08-22 05:28:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29614103] [2020-08-22 05:28:42,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416019644] [2020-08-22 05:28:42,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,678 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-22 05:28:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,710 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 05:28:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 05:28:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,712 INFO L225 Difference]: With dead ends: 312 [2020-08-22 05:28:42,712 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 05:28:42,713 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 [2020-08-22 05:28:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 05:28:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-22 05:28:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 05:28:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-22 05:28:42,725 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-22 05:28:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,726 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-22 05:28:42,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-22 05:28:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 05:28:42,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,728 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] [2020-08-22 05:28:42,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:28:42,728 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,729 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-22 05:28:42,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268475960] [2020-08-22 05:28:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268475960] [2020-08-22 05:28:42,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998603141] [2020-08-22 05:28:42,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,758 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-22 05:28:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,787 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-22 05:28:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 05:28:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,791 INFO L225 Difference]: With dead ends: 380 [2020-08-22 05:28:42,791 INFO L226 Difference]: Without dead ends: 378 [2020-08-22 05:28:42,792 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 [2020-08-22 05:28:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-22 05:28:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-22 05:28:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 05:28:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-22 05:28:42,805 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-22 05:28:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,806 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-22 05:28:42,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-22 05:28:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 05:28:42,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,808 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] [2020-08-22 05:28:42,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:28:42,808 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-22 05:28:42,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798879671] [2020-08-22 05:28:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798879671] [2020-08-22 05:28:42,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967818080] [2020-08-22 05:28:42,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,855 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-22 05:28:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,883 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-22 05:28:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 05:28:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,886 INFO L225 Difference]: With dead ends: 684 [2020-08-22 05:28:42,887 INFO L226 Difference]: Without dead ends: 402 [2020-08-22 05:28:42,888 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 [2020-08-22 05:28:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-22 05:28:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-22 05:28:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-22 05:28:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-22 05:28:42,904 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-22 05:28:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,904 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-22 05:28:42,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-22 05:28:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 05:28:42,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,906 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] [2020-08-22 05:28:42,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:28:42,907 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-22 05:28:42,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984121387] [2020-08-22 05:28:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984121387] [2020-08-22 05:28:42,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184148881] [2020-08-22 05:28:42,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,936 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-22 05:28:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:42,957 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-22 05:28:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:42,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 05:28:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:42,960 INFO L225 Difference]: With dead ends: 600 [2020-08-22 05:28:42,960 INFO L226 Difference]: Without dead ends: 410 [2020-08-22 05:28:42,961 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 [2020-08-22 05:28:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-22 05:28:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-22 05:28:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-22 05:28:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-22 05:28:42,975 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-22 05:28:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,976 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-22 05:28:42,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-22 05:28:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 05:28:42,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,977 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] [2020-08-22 05:28:42,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 05:28:42,978 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-22 05:28:42,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225533149] [2020-08-22 05:28:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225533149] [2020-08-22 05:28:43,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855229574] [2020-08-22 05:28:43,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,015 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-22 05:28:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:43,043 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-22 05:28:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:43,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 05:28:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:43,047 INFO L225 Difference]: With dead ends: 716 [2020-08-22 05:28:43,048 INFO L226 Difference]: Without dead ends: 714 [2020-08-22 05:28:43,048 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 [2020-08-22 05:28:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-22 05:28:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-22 05:28:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-22 05:28:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-22 05:28:43,068 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-22 05:28:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:43,069 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-22 05:28:43,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-22 05:28:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 05:28:43,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:43,071 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] [2020-08-22 05:28:43,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 05:28:43,071 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-22 05:28:43,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:43,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276173877] [2020-08-22 05:28:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276173877] [2020-08-22 05:28:43,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026258534] [2020-08-22 05:28:43,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,099 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-22 05:28:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:43,126 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-22 05:28:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:43,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 05:28:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:43,131 INFO L225 Difference]: With dead ends: 1340 [2020-08-22 05:28:43,131 INFO L226 Difference]: Without dead ends: 778 [2020-08-22 05:28:43,133 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 [2020-08-22 05:28:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-22 05:28:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-22 05:28:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 05:28:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-22 05:28:43,161 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-22 05:28:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:43,161 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-22 05:28:43,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-22 05:28:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 05:28:43,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:43,163 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] [2020-08-22 05:28:43,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 05:28:43,164 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-22 05:28:43,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:43,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491293964] [2020-08-22 05:28:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491293964] [2020-08-22 05:28:43,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013441321] [2020-08-22 05:28:43,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,188 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-22 05:28:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:43,220 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-22 05:28:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:43,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 05:28:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:43,225 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 05:28:43,225 INFO L226 Difference]: Without dead ends: 794 [2020-08-22 05:28:43,226 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 [2020-08-22 05:28:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-22 05:28:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-22 05:28:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-22 05:28:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-22 05:28:43,255 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-22 05:28:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:43,255 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-22 05:28:43,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-22 05:28:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 05:28:43,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:43,257 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] [2020-08-22 05:28:43,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 05:28:43,258 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-22 05:28:43,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:43,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654568527] [2020-08-22 05:28:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654568527] [2020-08-22 05:28:43,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800040937] [2020-08-22 05:28:43,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,284 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-22 05:28:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:43,330 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-22 05:28:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:43,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 05:28:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:43,336 INFO L225 Difference]: With dead ends: 1356 [2020-08-22 05:28:43,337 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 05:28:43,337 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 [2020-08-22 05:28:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 05:28:43,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-22 05:28:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-22 05:28:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-22 05:28:43,370 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-22 05:28:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:43,370 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-22 05:28:43,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-22 05:28:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 05:28:43,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:43,372 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] [2020-08-22 05:28:43,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 05:28:43,373 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-22 05:28:43,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:43,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31819737] [2020-08-22 05:28:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31819737] [2020-08-22 05:28:43,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854345321] [2020-08-22 05:28:43,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,393 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-22 05:28:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:43,432 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-22 05:28:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:43,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 05:28:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:43,439 INFO L225 Difference]: With dead ends: 2636 [2020-08-22 05:28:43,439 INFO L226 Difference]: Without dead ends: 1514 [2020-08-22 05:28:43,442 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 [2020-08-22 05:28:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-22 05:28:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-22 05:28:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-22 05:28:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-22 05:28:43,485 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-22 05:28:43,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:43,486 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-22 05:28:43,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-22 05:28:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 05:28:43,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:43,489 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] [2020-08-22 05:28:43,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 05:28:43,489 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-22 05:28:43,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:43,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580206180] [2020-08-22 05:28:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580206180] [2020-08-22 05:28:43,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345774096] [2020-08-22 05:28:43,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,512 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-22 05:28:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:43,552 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-22 05:28:43,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:43,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 05:28:43,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:43,560 INFO L225 Difference]: With dead ends: 2268 [2020-08-22 05:28:43,560 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 05:28:43,563 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 [2020-08-22 05:28:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 05:28:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-22 05:28:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 05:28:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-22 05:28:43,611 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-22 05:28:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:43,612 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-22 05:28:43,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-22 05:28:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 05:28:43,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:43,615 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] [2020-08-22 05:28:43,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 05:28:43,616 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-22 05:28:43,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:43,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588426473] [2020-08-22 05:28:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588426473] [2020-08-22 05:28:43,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864427117] [2020-08-22 05:28:43,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,652 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-22 05:28:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:43,726 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-22 05:28:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:43,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 05:28:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:43,742 INFO L225 Difference]: With dead ends: 2572 [2020-08-22 05:28:43,742 INFO L226 Difference]: Without dead ends: 2570 [2020-08-22 05:28:43,743 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 [2020-08-22 05:28:43,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-22 05:28:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-22 05:28:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-22 05:28:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-22 05:28:43,842 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-22 05:28:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:43,842 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-22 05:28:43,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-22 05:28:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 05:28:43,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:43,848 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] [2020-08-22 05:28:43,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 05:28:43,848 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:43,849 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-22 05:28:43,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:43,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144648757] [2020-08-22 05:28:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144648757] [2020-08-22 05:28:43,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060333108] [2020-08-22 05:28:43,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,929 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-22 05:28:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:44,034 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-22 05:28:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:44,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 05:28:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:44,048 INFO L225 Difference]: With dead ends: 5196 [2020-08-22 05:28:44,049 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 05:28:44,054 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 [2020-08-22 05:28:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 05:28:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-22 05:28:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-22 05:28:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-22 05:28:44,139 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-22 05:28:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:44,139 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-22 05:28:44,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-22 05:28:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:28:44,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:44,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:44,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 05:28:44,150 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:44,150 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-22 05:28:44,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:44,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627227126] [2020-08-22 05:28:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:44,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:44,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627227126] [2020-08-22 05:28:44,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:44,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:44,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192161748] [2020-08-22 05:28:44,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:44,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:44,178 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-22 05:28:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:44,238 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-22 05:28:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:44,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 05:28:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:44,251 INFO L225 Difference]: With dead ends: 4428 [2020-08-22 05:28:44,251 INFO L226 Difference]: Without dead ends: 3018 [2020-08-22 05:28:44,255 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 [2020-08-22 05:28:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-22 05:28:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-22 05:28:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 05:28:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-22 05:28:44,339 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-22 05:28:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:44,339 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-22 05:28:44,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-22 05:28:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:28:44,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:44,344 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] [2020-08-22 05:28:44,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 05:28:44,344 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:44,345 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-22 05:28:44,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:44,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917515943] [2020-08-22 05:28:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:44,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:44,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917515943] [2020-08-22 05:28:44,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:44,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:44,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973709957] [2020-08-22 05:28:44,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:44,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:44,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:44,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:44,376 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-22 05:28:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:44,492 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-22 05:28:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:44,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 05:28:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:44,505 INFO L225 Difference]: With dead ends: 8650 [2020-08-22 05:28:44,506 INFO L226 Difference]: Without dead ends: 3016 [2020-08-22 05:28:44,515 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 [2020-08-22 05:28:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-22 05:28:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-22 05:28:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 05:28:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-22 05:28:44,605 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-22 05:28:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:44,605 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-22 05:28:44,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-22 05:28:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:28:44,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:44,610 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] [2020-08-22 05:28:44,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 05:28:44,612 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:44,612 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-22 05:28:44,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:44,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034278592] [2020-08-22 05:28:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:44,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:44,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034278592] [2020-08-22 05:28:44,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:44,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:44,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541929867] [2020-08-22 05:28:44,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:44,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:44,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:44,640 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-22 05:28:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:44,683 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-22 05:28:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:44,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 05:28:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:44,684 INFO L225 Difference]: With dead ends: 3016 [2020-08-22 05:28:44,685 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 05:28:44,689 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 [2020-08-22 05:28:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 05:28:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 05:28:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 05:28:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 05:28:44,690 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-22 05:28:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:44,691 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 05:28:44,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 05:28:44,691 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 05:28:44,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 05:28:44,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 05:28:44,716 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 05:28:44,716 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 05:28:44,716 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 05:28:44,717 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 05:28:44,717 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 05:28:44,717 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 05:28:44,717 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-22 05:28:44,717 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-22 05:28:44,717 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,717 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-22 05:28:44,717 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,718 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-22 05:28:44,718 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,718 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,718 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-22 05:28:44,718 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-22 05:28:44,718 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-22 05:28:44,718 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-22 05:28:44,719 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-22 05:28:44,720 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,720 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,720 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,721 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,721 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-22 05:28:44,721 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,721 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-22 05:28:44,721 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-22 05:28:44,721 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,721 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,721 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-22 05:28:44,721 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-22 05:28:44,722 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,722 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-22 05:28:44,722 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,722 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,722 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-22 05:28:44,722 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-22 05:28:44,722 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 05:28:44,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:28:44 BoogieIcfgContainer [2020-08-22 05:28:44,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:28:44,741 INFO L168 Benchmark]: Toolchain (without parser) took 4196.17 ms. Allocated memory was 140.0 MB in the beginning and 300.9 MB in the end (delta: 161.0 MB). Free memory was 103.1 MB in the beginning and 184.4 MB in the end (delta: -81.3 MB). Peak memory consumption was 79.7 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:44,742 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 05:28:44,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.24 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:44,743 INFO L168 Benchmark]: Boogie Preprocessor took 117.57 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.5 MB in the beginning and 180.3 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:44,744 INFO L168 Benchmark]: RCFGBuilder took 367.83 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 162.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:44,746 INFO L168 Benchmark]: TraceAbstraction took 3358.70 ms. Allocated memory was 202.4 MB in the beginning and 300.9 MB in the end (delta: 98.6 MB). Free memory was 161.9 MB in the beginning and 184.4 MB in the end (delta: -22.5 MB). Peak memory consumption was 76.1 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:44,754 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 346.24 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.57 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.5 MB in the beginning and 180.3 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.83 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 162.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3358.70 ms. Allocated memory was 202.4 MB in the beginning and 300.9 MB in the end (delta: 98.6 MB). Free memory was 161.9 MB in the beginning and 184.4 MB in the end (delta: -22.5 MB). Peak memory consumption was 76.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 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, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...