/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=0.5 --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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:17:06,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:17:06,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:17:06,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:17:06,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:17:06,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:17:06,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:17:06,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:17:06,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:17:06,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:17:06,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:17:06,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:17:06,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:17:06,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:17:06,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:17:06,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:17:06,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:17:06,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:17:06,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:17:06,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:17:06,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:17:06,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:17:06,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:17:06,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:17:07,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:17:07,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:17:07,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:17:07,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:17:07,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:17:07,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 06:17:07,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:17:07,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:17:07,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:17:07,025 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 06:17:07,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:17:07,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:17:07,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:17:07,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:17:07,070 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:17:07,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:17:07,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:17:07,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:17:07,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:17:07,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:17:07,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:17:07,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:17:07,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:17:07,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:17:07,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:17:07,073 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:17:07,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:17:07,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:17:07,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:17:07,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:17:07,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:17:07,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:17:07,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:17:07,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:17:07,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:17:07,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:17:07,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:17:07,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:17:07,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:17:07,076 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=0.5;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=0.5;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=0.5;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=0.5;log-additional-information=true; [2020-08-22 06:17:07,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:17:07,426 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:17:07,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:17:07,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:17:07,435 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:17:07,436 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-22 06:17:07,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79e6c6ea9/06af5625616a4008b35c78ed53a37941/FLAGf21f12885 [2020-08-22 06:17:07,942 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:17:07,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-22 06:17:07,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79e6c6ea9/06af5625616a4008b35c78ed53a37941/FLAGf21f12885 [2020-08-22 06:17:08,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79e6c6ea9/06af5625616a4008b35c78ed53a37941 [2020-08-22 06:17:08,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:17:08,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:17:08,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:17:08,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:17:08,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:17:08,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08, skipping insertion in model container [2020-08-22 06:17:08,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:17:08,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:17:08,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:17:08,627 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:17:08,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:17:08,709 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:17:08,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08 WrapperNode [2020-08-22 06:17:08,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:17:08,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:17:08,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:17:08,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:17:08,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (1/1) ... [2020-08-22 06:17:08,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:17:08,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:17:08,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:17:08,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:17:08,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (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 06:17:08,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:17:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:17:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:17:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:17:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:17:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:17:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:17:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:17:09,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:17:09,234 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 06:17:09,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:17:09 BoogieIcfgContainer [2020-08-22 06:17:09,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:17:09,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:17:09,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:17:09,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:17:09,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:17:08" (1/3) ... [2020-08-22 06:17:09,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0175b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:17:09, skipping insertion in model container [2020-08-22 06:17:09,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:08" (2/3) ... [2020-08-22 06:17:09,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0175b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:17:09, skipping insertion in model container [2020-08-22 06:17:09,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:17:09" (3/3) ... [2020-08-22 06:17:09,250 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-22 06:17:09,265 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:17:09,277 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:17:09,296 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:17:09,327 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:17:09,327 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:17:09,328 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:17:09,328 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:17:09,328 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:17:09,328 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:17:09,329 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:17:09,329 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:17:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-22 06:17:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 06:17:09,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:09,379 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 06:17:09,380 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:09,387 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-22 06:17:09,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:09,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752489846] [2020-08-22 06:17:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:09,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:09,662 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 06:17:09,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752489846] [2020-08-22 06:17:09,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:09,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:09,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459768961] [2020-08-22 06:17:09,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:09,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:09,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:09,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:09,686 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-22 06:17:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:09,757 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-22 06:17:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:09,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 06:17:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:09,771 INFO L225 Difference]: With dead ends: 87 [2020-08-22 06:17:09,771 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 06:17:09,775 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 06:17:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 06:17:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-22 06:17:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 06:17:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-22 06:17:09,824 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-22 06:17:09,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:09,824 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-22 06:17:09,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-22 06:17:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 06:17:09,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:09,826 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 06:17:09,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:17:09,827 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:09,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-22 06:17:09,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:09,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321896771] [2020-08-22 06:17:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:09,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:09,920 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 06:17:09,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321896771] [2020-08-22 06:17:09,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:09,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:09,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767862340] [2020-08-22 06:17:09,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:09,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:09,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:09,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:09,930 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-22 06:17:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:09,956 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-22 06:17:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:09,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 06:17:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:09,959 INFO L225 Difference]: With dead ends: 117 [2020-08-22 06:17:09,959 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 06:17:09,960 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 06:17:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 06:17:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-22 06:17:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 06:17:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-22 06:17:09,973 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-22 06:17:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:09,973 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-22 06:17:09,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-22 06:17:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 06:17:09,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:09,975 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 06:17:09,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:17:09,976 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-22 06:17:09,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:09,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413068964] [2020-08-22 06:17:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,027 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 06:17:10,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413068964] [2020-08-22 06:17:10,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070926089] [2020-08-22 06:17:10,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,030 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-22 06:17:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,054 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-22 06:17:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 06:17:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,056 INFO L225 Difference]: With dead ends: 108 [2020-08-22 06:17:10,056 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 06:17:10,057 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 06:17:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 06:17:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-22 06:17:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 06:17:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-22 06:17:10,068 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-22 06:17:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,069 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-22 06:17:10,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-22 06:17:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 06:17:10,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,070 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 06:17:10,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:17:10,071 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-22 06:17:10,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375472134] [2020-08-22 06:17:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,136 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 06:17:10,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375472134] [2020-08-22 06:17:10,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660139108] [2020-08-22 06:17:10,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,139 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-22 06:17:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,161 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-22 06:17:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 06:17:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,164 INFO L225 Difference]: With dead ends: 136 [2020-08-22 06:17:10,164 INFO L226 Difference]: Without dead ends: 134 [2020-08-22 06:17:10,165 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 06:17:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-22 06:17:10,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-22 06:17:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 06:17:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-22 06:17:10,178 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-22 06:17:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,179 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-22 06:17:10,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-22 06:17:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 06:17:10,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,180 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 06:17:10,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:17:10,181 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,181 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-22 06:17:10,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551731246] [2020-08-22 06:17:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,224 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 06:17:10,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551731246] [2020-08-22 06:17:10,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524198523] [2020-08-22 06:17:10,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,227 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-22 06:17:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,251 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-22 06:17:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 06:17:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,254 INFO L225 Difference]: With dead ends: 224 [2020-08-22 06:17:10,254 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 06:17:10,255 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 06:17:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 06:17:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-22 06:17:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 06:17:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-22 06:17:10,275 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-22 06:17:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,275 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-22 06:17:10,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-22 06:17:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:10,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,277 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 06:17:10,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:17:10,278 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-22 06:17:10,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71194665] [2020-08-22 06:17:10,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,367 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 06:17:10,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71194665] [2020-08-22 06:17:10,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327117230] [2020-08-22 06:17:10,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,373 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-22 06:17:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,394 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-22 06:17:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,396 INFO L225 Difference]: With dead ends: 201 [2020-08-22 06:17:10,397 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 06:17:10,398 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 06:17:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 06:17:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-22 06:17:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 06:17:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-22 06:17:10,412 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-22 06:17:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,413 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-22 06:17:10,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-22 06:17:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:10,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,415 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 06:17:10,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:17:10,415 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,416 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-22 06:17:10,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347511538] [2020-08-22 06:17:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:10,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347511538] [2020-08-22 06:17:10,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611828273] [2020-08-22 06:17:10,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,481 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-22 06:17:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,501 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-22 06:17:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:10,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,504 INFO L225 Difference]: With dead ends: 252 [2020-08-22 06:17:10,504 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 06:17:10,505 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 06:17:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 06:17:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-22 06:17:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 06:17:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-22 06:17:10,523 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-22 06:17:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,524 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-22 06:17:10,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-22 06:17:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:10,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,526 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 06:17:10,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:17:10,526 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,527 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-22 06:17:10,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276724414] [2020-08-22 06:17:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,568 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 06:17:10,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276724414] [2020-08-22 06:17:10,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937364568] [2020-08-22 06:17:10,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,572 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-22 06:17:10,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,606 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-22 06:17:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:10,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,609 INFO L225 Difference]: With dead ends: 432 [2020-08-22 06:17:10,610 INFO L226 Difference]: Without dead ends: 258 [2020-08-22 06:17:10,611 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 06:17:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-22 06:17:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-22 06:17:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 06:17:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-22 06:17:10,628 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-22 06:17:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,628 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-22 06:17:10,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-22 06:17:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:10,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,630 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 06:17:10,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:17:10,631 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-22 06:17:10,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152111203] [2020-08-22 06:17:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,661 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 06:17:10,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152111203] [2020-08-22 06:17:10,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303587357] [2020-08-22 06:17:10,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,664 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-22 06:17:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,699 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-22 06:17:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,701 INFO L225 Difference]: With dead ends: 384 [2020-08-22 06:17:10,701 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 06:17:10,703 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 06:17:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 06:17:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-22 06:17:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-22 06:17:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-22 06:17:10,715 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-22 06:17:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,716 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-22 06:17:10,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-22 06:17:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:10,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,718 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 06:17:10,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:17:10,718 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-22 06:17:10,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418812984] [2020-08-22 06:17:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,748 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 06:17:10,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418812984] [2020-08-22 06:17:10,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666599402] [2020-08-22 06:17:10,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,750 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-22 06:17:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,771 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-22 06:17:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,775 INFO L225 Difference]: With dead ends: 476 [2020-08-22 06:17:10,775 INFO L226 Difference]: Without dead ends: 474 [2020-08-22 06:17:10,776 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 06:17:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-22 06:17:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-22 06:17:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-22 06:17:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-22 06:17:10,790 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-22 06:17:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,791 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-22 06:17:10,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-22 06:17:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:10,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,794 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 06:17:10,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:17:10,794 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,794 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-22 06:17:10,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962808196] [2020-08-22 06:17:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,822 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 06:17:10,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962808196] [2020-08-22 06:17:10,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218795164] [2020-08-22 06:17:10,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,825 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-22 06:17:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,855 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-22 06:17:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:10,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,861 INFO L225 Difference]: With dead ends: 844 [2020-08-22 06:17:10,862 INFO L226 Difference]: Without dead ends: 498 [2020-08-22 06:17:10,863 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 06:17:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-22 06:17:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-22 06:17:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-22 06:17:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-22 06:17:10,881 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-22 06:17:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,882 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-22 06:17:10,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-22 06:17:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 06:17:10,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,883 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 06:17:10,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:17:10,884 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,884 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-22 06:17:10,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674409123] [2020-08-22 06:17:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,917 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 06:17:10,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674409123] [2020-08-22 06:17:10,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938599261] [2020-08-22 06:17:10,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:10,919 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-22 06:17:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:10,945 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-22 06:17:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:10,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 06:17:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:10,949 INFO L225 Difference]: With dead ends: 744 [2020-08-22 06:17:10,949 INFO L226 Difference]: Without dead ends: 506 [2020-08-22 06:17:10,950 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 06:17:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-22 06:17:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-22 06:17:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-22 06:17:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-22 06:17:10,967 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-22 06:17:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:10,967 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-22 06:17:10,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-22 06:17:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 06:17:10,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:10,969 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 06:17:10,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:17:10,970 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-22 06:17:10,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:10,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547227858] [2020-08-22 06:17:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:10,997 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 06:17:10,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547227858] [2020-08-22 06:17:10,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:10,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:10,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210750095] [2020-08-22 06:17:10,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:10,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,000 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-22 06:17:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,024 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-22 06:17:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 06:17:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,029 INFO L225 Difference]: With dead ends: 908 [2020-08-22 06:17:11,030 INFO L226 Difference]: Without dead ends: 906 [2020-08-22 06:17:11,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-22 06:17:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-22 06:17:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-22 06:17:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-22 06:17:11,054 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-22 06:17:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,054 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-22 06:17:11,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-22 06:17:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 06:17:11,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,056 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 06:17:11,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 06:17:11,057 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-22 06:17:11,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549726249] [2020-08-22 06:17:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,084 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 06:17:11,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549726249] [2020-08-22 06:17:11,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177085977] [2020-08-22 06:17:11,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,086 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-22 06:17:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,121 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-22 06:17:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 06:17:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,128 INFO L225 Difference]: With dead ends: 1660 [2020-08-22 06:17:11,129 INFO L226 Difference]: Without dead ends: 970 [2020-08-22 06:17:11,131 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 06:17:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-22 06:17:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-22 06:17:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-22 06:17:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-22 06:17:11,165 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-22 06:17:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,166 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-22 06:17:11,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-22 06:17:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 06:17:11,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 06:17:11,169 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-22 06:17:11,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818472343] [2020-08-22 06:17:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,195 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 06:17:11,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818472343] [2020-08-22 06:17:11,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089765936] [2020-08-22 06:17:11,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,198 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-22 06:17:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,226 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-22 06:17:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 06:17:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,233 INFO L225 Difference]: With dead ends: 1452 [2020-08-22 06:17:11,233 INFO L226 Difference]: Without dead ends: 986 [2020-08-22 06:17:11,235 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 06:17:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-22 06:17:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-22 06:17:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-22 06:17:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-22 06:17:11,277 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-22 06:17:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,277 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-22 06:17:11,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-22 06:17:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 06:17:11,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,279 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 06:17:11,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 06:17:11,280 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-22 06:17:11,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675408112] [2020-08-22 06:17:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,305 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 06:17:11,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675408112] [2020-08-22 06:17:11,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959877174] [2020-08-22 06:17:11,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,308 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-22 06:17:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,340 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-22 06:17:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 06:17:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,350 INFO L225 Difference]: With dead ends: 1740 [2020-08-22 06:17:11,350 INFO L226 Difference]: Without dead ends: 1738 [2020-08-22 06:17:11,351 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 06:17:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-22 06:17:11,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-22 06:17:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-22 06:17:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-22 06:17:11,392 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-22 06:17:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,392 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-22 06:17:11,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-22 06:17:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 06:17:11,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,395 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 06:17:11,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 06:17:11,396 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-22 06:17:11,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687992851] [2020-08-22 06:17:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,417 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 06:17:11,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687992851] [2020-08-22 06:17:11,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705975458] [2020-08-22 06:17:11,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,419 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-22 06:17:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,465 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-22 06:17:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 06:17:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,476 INFO L225 Difference]: With dead ends: 3276 [2020-08-22 06:17:11,476 INFO L226 Difference]: Without dead ends: 1898 [2020-08-22 06:17:11,479 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 06:17:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-22 06:17:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-22 06:17:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-22 06:17:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-22 06:17:11,535 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-22 06:17:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,535 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-22 06:17:11,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-22 06:17:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 06:17:11,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 06:17:11,539 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-22 06:17:11,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267507002] [2020-08-22 06:17:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,559 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 06:17:11,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267507002] [2020-08-22 06:17:11,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638915448] [2020-08-22 06:17:11,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,561 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-22 06:17:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,603 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-22 06:17:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 06:17:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,614 INFO L225 Difference]: With dead ends: 2844 [2020-08-22 06:17:11,614 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 06:17:11,618 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 06:17:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 06:17:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-22 06:17:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-22 06:17:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-22 06:17:11,695 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-22 06:17:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,695 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-22 06:17:11,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-22 06:17:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 06:17:11,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 06:17:11,699 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-22 06:17:11,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116068922] [2020-08-22 06:17:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,727 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 06:17:11,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116068922] [2020-08-22 06:17:11,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953741681] [2020-08-22 06:17:11,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,730 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-22 06:17:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:11,806 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-22 06:17:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:11,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 06:17:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:11,824 INFO L225 Difference]: With dead ends: 3340 [2020-08-22 06:17:11,824 INFO L226 Difference]: Without dead ends: 3338 [2020-08-22 06:17:11,826 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 06:17:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-22 06:17:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-22 06:17:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-22 06:17:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-22 06:17:11,948 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-22 06:17:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:11,948 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-22 06:17:11,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-22 06:17:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 06:17:11,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:11,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:11,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 06:17:11,955 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:11,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:11,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-22 06:17:11,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:11,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473853058] [2020-08-22 06:17:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:11,982 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 06:17:11,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473853058] [2020-08-22 06:17:11,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:11,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:11,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723706341] [2020-08-22 06:17:11,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:11,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:11,985 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-22 06:17:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,078 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-22 06:17:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 06:17:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,101 INFO L225 Difference]: With dead ends: 6476 [2020-08-22 06:17:12,101 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 06:17:12,109 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 06:17:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 06:17:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-22 06:17:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-22 06:17:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-22 06:17:12,226 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-22 06:17:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,227 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-22 06:17:12,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-22 06:17:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:17:12,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 06:17:12,233 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-22 06:17:12,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133399956] [2020-08-22 06:17:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:12,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133399956] [2020-08-22 06:17:12,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601916132] [2020-08-22 06:17:12,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,266 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-22 06:17:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,335 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-22 06:17:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 06:17:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,353 INFO L225 Difference]: With dead ends: 5580 [2020-08-22 06:17:12,353 INFO L226 Difference]: Without dead ends: 3786 [2020-08-22 06:17:12,358 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 06:17:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-22 06:17:12,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-22 06:17:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-22 06:17:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-22 06:17:12,498 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-22 06:17:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,498 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-22 06:17:12,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-22 06:17:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:17:12,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 06:17:12,504 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-22 06:17:12,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103471741] [2020-08-22 06:17:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,529 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 06:17:12,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103471741] [2020-08-22 06:17:12,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458216561] [2020-08-22 06:17:12,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,532 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-22 06:17:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:12,648 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-22 06:17:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:12,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 06:17:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:12,691 INFO L225 Difference]: With dead ends: 10956 [2020-08-22 06:17:12,691 INFO L226 Difference]: Without dead ends: 7306 [2020-08-22 06:17:12,700 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 06:17:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-22 06:17:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-22 06:17:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-22 06:17:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-22 06:17:12,906 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-22 06:17:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:12,907 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-22 06:17:12,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-22 06:17:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 06:17:12,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:12,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:12,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 06:17:12,920 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-22 06:17:12,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:12,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183546851] [2020-08-22 06:17:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:12,960 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 06:17:12,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183546851] [2020-08-22 06:17:12,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:12,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:12,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545126366] [2020-08-22 06:17:12,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:12,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:12,965 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-22 06:17:13,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:13,155 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-22 06:17:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:13,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 06:17:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:13,173 INFO L225 Difference]: With dead ends: 8076 [2020-08-22 06:17:13,173 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 06:17:13,176 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 06:17:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 06:17:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-22 06:17:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-22 06:17:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-22 06:17:13,363 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-22 06:17:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:13,364 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-22 06:17:13,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-22 06:17:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 06:17:13,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:13,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:13,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 06:17:13,376 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:13,376 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-22 06:17:13,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:13,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854128496] [2020-08-22 06:17:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,414 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 06:17:13,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854128496] [2020-08-22 06:17:13,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:13,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:13,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967324919] [2020-08-22 06:17:13,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:13,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:13,416 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-22 06:17:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:13,560 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-22 06:17:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:13,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 06:17:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:13,583 INFO L225 Difference]: With dead ends: 12172 [2020-08-22 06:17:13,583 INFO L226 Difference]: Without dead ends: 12170 [2020-08-22 06:17:13,588 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 06:17:13,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-22 06:17:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-22 06:17:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-22 06:17:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-22 06:17:13,864 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-22 06:17:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:13,864 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-22 06:17:13,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:13,864 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-22 06:17:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 06:17:13,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:13,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:13,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 06:17:13,881 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:13,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:13,882 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-22 06:17:13,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:13,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740432461] [2020-08-22 06:17:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:13,902 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 06:17:13,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740432461] [2020-08-22 06:17:13,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:13,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:13,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523583936] [2020-08-22 06:17:13,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:13,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:13,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:13,904 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-22 06:17:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:14,099 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-22 06:17:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:14,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 06:17:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:14,126 INFO L225 Difference]: With dead ends: 25228 [2020-08-22 06:17:14,126 INFO L226 Difference]: Without dead ends: 14218 [2020-08-22 06:17:14,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-22 06:17:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-22 06:17:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-22 06:17:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-22 06:17:14,564 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-22 06:17:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:14,564 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-22 06:17:14,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-22 06:17:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 06:17:14,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:14,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:14,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 06:17:14,581 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-22 06:17:14,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:14,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984823976] [2020-08-22 06:17:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:14,609 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 06:17:14,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984823976] [2020-08-22 06:17:14,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:14,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:14,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690667485] [2020-08-22 06:17:14,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:14,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:14,612 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-22 06:17:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:14,777 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-22 06:17:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:14,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 06:17:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:14,806 INFO L225 Difference]: With dead ends: 21516 [2020-08-22 06:17:14,806 INFO L226 Difference]: Without dead ends: 14602 [2020-08-22 06:17:14,825 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 06:17:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-22 06:17:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-22 06:17:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-22 06:17:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-22 06:17:15,630 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-22 06:17:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:15,630 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-22 06:17:15,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:15,630 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-22 06:17:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 06:17:15,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:15,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:15,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 06:17:15,647 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:15,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-22 06:17:15,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:15,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79206460] [2020-08-22 06:17:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:15,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:15,673 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 06:17:15,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79206460] [2020-08-22 06:17:15,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:15,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:15,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685704888] [2020-08-22 06:17:15,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:15,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:15,675 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-22 06:17:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:15,901 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-22 06:17:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:15,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 06:17:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:15,941 INFO L225 Difference]: With dead ends: 23562 [2020-08-22 06:17:15,941 INFO L226 Difference]: Without dead ends: 23560 [2020-08-22 06:17:15,950 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 06:17:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-22 06:17:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-22 06:17:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-22 06:17:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-22 06:17:16,433 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-22 06:17:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:16,434 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-22 06:17:16,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-22 06:17:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 06:17:16,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:16,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:16,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 06:17:16,465 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-22 06:17:16,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:16,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806550424] [2020-08-22 06:17:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:16,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:16,483 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 06:17:16,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806550424] [2020-08-22 06:17:16,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:16,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:16,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221703329] [2020-08-22 06:17:16,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:16,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:16,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:16,485 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-22 06:17:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:16,770 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-22 06:17:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:16,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 06:17:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:16,771 INFO L225 Difference]: With dead ends: 50184 [2020-08-22 06:17:16,772 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 06:17:16,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 06:17:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 06:17:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 06:17:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 06:17:16,832 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-22 06:17:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:16,832 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 06:17:16,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 06:17:16,832 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 06:17:16,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 06:17:16,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 06:17:16,861 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 06:17:16,861 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:17:16,862 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:17:16,862 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 06:17:16,862 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 06:17:16,862 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 06:17:16,863 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-22 06:17:16,863 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-22 06:17:16,863 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,863 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,863 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,865 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,865 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-22 06:17:16,865 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,865 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-22 06:17:16,866 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,866 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,866 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,866 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-22 06:17:16,866 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-22 06:17:16,866 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-22 06:17:16,867 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-22 06:17:16,867 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-22 06:17:16,867 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-22 06:17:16,867 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-22 06:17:16,868 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,868 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,868 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-22 06:17:16,868 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-22 06:17:16,868 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,868 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,869 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,869 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,869 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,869 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-22 06:17:16,869 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,870 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-22 06:17:16,870 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,870 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-22 06:17:16,870 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-22 06:17:16,870 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,870 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 06:17:16,871 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-22 06:17:16,871 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-22 06:17:16,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:17:16 BoogieIcfgContainer [2020-08-22 06:17:16,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:17:16,897 INFO L168 Benchmark]: Toolchain (without parser) took 8575.26 ms. Allocated memory was 138.9 MB in the beginning and 531.6 MB in the end (delta: 392.7 MB). Free memory was 102.3 MB in the beginning and 145.3 MB in the end (delta: -43.0 MB). Peak memory consumption was 349.6 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:16,899 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 06:17:16,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.57 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 91.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:16,904 INFO L168 Benchmark]: Boogie Preprocessor took 158.61 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 179.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:16,905 INFO L168 Benchmark]: RCFGBuilder took 368.53 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 160.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:16,905 INFO L168 Benchmark]: TraceAbstraction took 7653.04 ms. Allocated memory was 201.9 MB in the beginning and 531.6 MB in the end (delta: 329.8 MB). Free memory was 159.5 MB in the beginning and 145.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 343.9 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:16,911 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 389.57 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 91.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.61 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 179.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.53 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 160.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7653.04 ms. Allocated memory was 201.9 MB in the beginning and 531.6 MB in the end (delta: 329.8 MB). Free memory was 159.5 MB in the beginning and 145.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 343.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: 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, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.2s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 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, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...