/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:59:41,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:59:41,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:59:41,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:59:41,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:59:41,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:59:41,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:59:41,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:59:41,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:59:41,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:59:41,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:59:41,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:59:41,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:59:41,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:59:41,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:59:41,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:59:41,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:59:41,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:59:41,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:59:41,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:59:41,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:59:41,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:59:41,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:59:41,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:59:41,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:59:41,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:59:41,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:59:41,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:59:41,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:59:41,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 22:59:41,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:59:41,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:59:41,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:59:41,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:59:41,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:59:41,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:59:41,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:59:41,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:59:41,974 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:59:41,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:59:41,974 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:59:41,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:59:41,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:59:41,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:59:41,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:59:41,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:59:41,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:59:41,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:59:41,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:59:41,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:59:41,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:59:41,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:59:41,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:59:41,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:59:41,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:59:41,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:41,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:59:41,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:59:41,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:59:41,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:59:41,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:59:41,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:59:41,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:59:41,979 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=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:59:42,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:59:42,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:59:42,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:59:42,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:59:42,301 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:59:42,301 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 22:59:42,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c9952f9d/ea2337dc79f94287b504aaba86158ae5/FLAG7f60b67eb [2020-08-21 22:59:42,877 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:59:42,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 22:59:42,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c9952f9d/ea2337dc79f94287b504aaba86158ae5/FLAG7f60b67eb [2020-08-21 22:59:43,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c9952f9d/ea2337dc79f94287b504aaba86158ae5 [2020-08-21 22:59:43,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:59:43,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:59:43,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:43,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:59:43,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:59:43,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43, skipping insertion in model container [2020-08-21 22:59:43,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:59:43,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:59:43,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:43,464 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:59:43,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:59:43,528 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:59:43,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43 WrapperNode [2020-08-21 22:59:43,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:59:43,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:59:43,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:59:43,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:59:43,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (1/1) ... [2020-08-21 22:59:43,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:59:43,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:59:43,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:59:43,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:59:43,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:59:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:59:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:59:43,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:59:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:59:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:59:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:59:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:59:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:59:44,003 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:59:44,004 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:59:44,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:44 BoogieIcfgContainer [2020-08-21 22:59:44,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:59:44,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:59:44,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:59:44,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:59:44,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:59:43" (1/3) ... [2020-08-21 22:59:44,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ebe48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:44, skipping insertion in model container [2020-08-21 22:59:44,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:59:43" (2/3) ... [2020-08-21 22:59:44,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ebe48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:59:44, skipping insertion in model container [2020-08-21 22:59:44,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:59:44" (3/3) ... [2020-08-21 22:59:44,020 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-21 22:59:44,034 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:59:44,041 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:59:44,057 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:59:44,084 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:59:44,085 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:59:44,085 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:59:44,085 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:59:44,085 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:59:44,085 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:59:44,085 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:59:44,086 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:59:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-21 22:59:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:44,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,126 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-21 22:59:44,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173310793] [2020-08-21 22:59:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173310793] [2020-08-21 22:59:44,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693374060] [2020-08-21 22:59:44,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,353 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-21 22:59:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,419 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-21 22:59:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 22:59:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,434 INFO L225 Difference]: With dead ends: 81 [2020-08-21 22:59:44,434 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 22:59:44,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 22:59:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-21 22:59:44,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 22:59:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-21 22:59:44,497 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-21 22:59:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,497 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-21 22:59:44,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-21 22:59:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:59:44,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:59:44,501 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,502 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-21 22:59:44,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074249320] [2020-08-21 22:59:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074249320] [2020-08-21 22:59:44,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553974943] [2020-08-21 22:59:44,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,604 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-21 22:59:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,654 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-21 22:59:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 22:59:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,657 INFO L225 Difference]: With dead ends: 107 [2020-08-21 22:59:44,657 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 22:59:44,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 22:59:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-21 22:59:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 22:59:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-21 22:59:44,672 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-21 22:59:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,675 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-21 22:59:44,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-21 22:59:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:44,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:59:44,677 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,680 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-21 22:59:44,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022078876] [2020-08-21 22:59:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022078876] [2020-08-21 22:59:44,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394756269] [2020-08-21 22:59:44,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,746 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-21 22:59:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,799 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-21 22:59:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:44,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,804 INFO L225 Difference]: With dead ends: 99 [2020-08-21 22:59:44,804 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 22:59:44,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 22:59:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-21 22:59:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 22:59:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-21 22:59:44,821 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-21 22:59:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,821 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-21 22:59:44,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-21 22:59:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:44,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:59:44,824 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-21 22:59:44,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488798174] [2020-08-21 22:59:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:44,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488798174] [2020-08-21 22:59:44,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:44,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:44,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794577225] [2020-08-21 22:59:44,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:44,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,915 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-21 22:59:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:44,944 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-21 22:59:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:44,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:44,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:44,946 INFO L225 Difference]: With dead ends: 124 [2020-08-21 22:59:44,947 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 22:59:44,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 22:59:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-21 22:59:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 22:59:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-21 22:59:44,964 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-21 22:59:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:44,964 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-21 22:59:44,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-21 22:59:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:59:44,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:44,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:44,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:59:44,967 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-21 22:59:44,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:44,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655668180] [2020-08-21 22:59:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655668180] [2020-08-21 22:59:45,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33617552] [2020-08-21 22:59:45,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,053 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-21 22:59:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,075 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-21 22:59:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 22:59:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,078 INFO L225 Difference]: With dead ends: 204 [2020-08-21 22:59:45,078 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 22:59:45,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 22:59:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-21 22:59:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 22:59:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-21 22:59:45,091 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-21 22:59:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,092 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-21 22:59:45,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-21 22:59:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:45,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:59:45,094 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-21 22:59:45,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339198023] [2020-08-21 22:59:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339198023] [2020-08-21 22:59:45,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780294555] [2020-08-21 22:59:45,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,136 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-21 22:59:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,156 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-21 22:59:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:45,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,158 INFO L225 Difference]: With dead ends: 183 [2020-08-21 22:59:45,158 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 22:59:45,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 22:59:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-21 22:59:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 22:59:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-21 22:59:45,171 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-21 22:59:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,173 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-21 22:59:45,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-21 22:59:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:45,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:59:45,176 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-21 22:59:45,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128979812] [2020-08-21 22:59:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128979812] [2020-08-21 22:59:45,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996586798] [2020-08-21 22:59:45,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,236 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-21 22:59:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,255 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-21 22:59:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,271 INFO L225 Difference]: With dead ends: 228 [2020-08-21 22:59:45,271 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 22:59:45,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 22:59:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-21 22:59:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 22:59:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-21 22:59:45,289 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-21 22:59:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,290 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-21 22:59:45,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-21 22:59:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:59:45,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:59:45,297 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-21 22:59:45,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603772228] [2020-08-21 22:59:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603772228] [2020-08-21 22:59:45,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058348219] [2020-08-21 22:59:45,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,360 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-21 22:59:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,380 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-21 22:59:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 22:59:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,383 INFO L225 Difference]: With dead ends: 392 [2020-08-21 22:59:45,383 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 22:59:45,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 22:59:45,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-21 22:59:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 22:59:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-21 22:59:45,397 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-21 22:59:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,398 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-21 22:59:45,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-21 22:59:45,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:45,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:59:45,400 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-21 22:59:45,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243305197] [2020-08-21 22:59:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243305197] [2020-08-21 22:59:45,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408061138] [2020-08-21 22:59:45,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,431 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-21 22:59:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,453 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-21 22:59:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,455 INFO L225 Difference]: With dead ends: 348 [2020-08-21 22:59:45,455 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 22:59:45,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 22:59:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-21 22:59:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-21 22:59:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-21 22:59:45,474 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-21 22:59:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,474 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-21 22:59:45,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-21 22:59:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:45,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:59:45,480 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,480 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-21 22:59:45,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625236944] [2020-08-21 22:59:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625236944] [2020-08-21 22:59:45,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155800137] [2020-08-21 22:59:45,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,525 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-21 22:59:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,547 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-21 22:59:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,550 INFO L225 Difference]: With dead ends: 428 [2020-08-21 22:59:45,551 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 22:59:45,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 22:59:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-21 22:59:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-21 22:59:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-21 22:59:45,565 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-21 22:59:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,565 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-21 22:59:45,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-21 22:59:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:59:45,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:59:45,568 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,568 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-21 22:59:45,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069213536] [2020-08-21 22:59:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069213536] [2020-08-21 22:59:45,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770336954] [2020-08-21 22:59:45,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,599 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-21 22:59:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,659 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-21 22:59:45,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 22:59:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,664 INFO L225 Difference]: With dead ends: 764 [2020-08-21 22:59:45,664 INFO L226 Difference]: Without dead ends: 450 [2020-08-21 22:59:45,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-21 22:59:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-21 22:59:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-21 22:59:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-21 22:59:45,705 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-21 22:59:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,706 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-21 22:59:45,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-21 22:59:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:45,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:59:45,708 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-21 22:59:45,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470265782] [2020-08-21 22:59:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470265782] [2020-08-21 22:59:45,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640489369] [2020-08-21 22:59:45,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,759 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-21 22:59:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,785 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-21 22:59:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,789 INFO L225 Difference]: With dead ends: 672 [2020-08-21 22:59:45,789 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 22:59:45,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 22:59:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-21 22:59:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 22:59:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-21 22:59:45,809 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-21 22:59:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,810 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-21 22:59:45,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-21 22:59:45,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:45,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:59:45,815 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-21 22:59:45,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475231420] [2020-08-21 22:59:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475231420] [2020-08-21 22:59:45,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915354389] [2020-08-21 22:59:45,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,857 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-21 22:59:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:45,882 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-21 22:59:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:45,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:45,888 INFO L225 Difference]: With dead ends: 812 [2020-08-21 22:59:45,889 INFO L226 Difference]: Without dead ends: 810 [2020-08-21 22:59:45,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-21 22:59:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-21 22:59:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-21 22:59:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-21 22:59:45,910 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-21 22:59:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:45,911 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-21 22:59:45,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-21 22:59:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 22:59:45,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:45,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:45,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:59:45,913 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-21 22:59:45,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:45,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165366879] [2020-08-21 22:59:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:45,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165366879] [2020-08-21 22:59:45,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:45,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:45,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218987242] [2020-08-21 22:59:45,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:45,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:45,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:45,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:45,978 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-21 22:59:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,008 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-21 22:59:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 22:59:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,014 INFO L225 Difference]: With dead ends: 1500 [2020-08-21 22:59:46,015 INFO L226 Difference]: Without dead ends: 874 [2020-08-21 22:59:46,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-21 22:59:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-21 22:59:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 22:59:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-21 22:59:46,051 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-21 22:59:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,051 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-21 22:59:46,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-21 22:59:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:46,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:59:46,055 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-21 22:59:46,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474291649] [2020-08-21 22:59:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474291649] [2020-08-21 22:59:46,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048390243] [2020-08-21 22:59:46,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,096 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-21 22:59:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,138 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-21 22:59:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,144 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 22:59:46,144 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 22:59:46,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 22:59:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-21 22:59:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-21 22:59:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-21 22:59:46,192 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-21 22:59:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,193 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-21 22:59:46,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-21 22:59:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:46,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:59:46,197 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-21 22:59:46,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101562071] [2020-08-21 22:59:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101562071] [2020-08-21 22:59:46,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045519610] [2020-08-21 22:59:46,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,263 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-21 22:59:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,298 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-21 22:59:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,308 INFO L225 Difference]: With dead ends: 1548 [2020-08-21 22:59:46,308 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 22:59:46,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 22:59:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-21 22:59:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-21 22:59:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-21 22:59:46,356 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-21 22:59:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,357 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-21 22:59:46,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-21 22:59:46,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 22:59:46,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:59:46,361 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-21 22:59:46,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972622746] [2020-08-21 22:59:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972622746] [2020-08-21 22:59:46,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100190102] [2020-08-21 22:59:46,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,384 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-21 22:59:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,427 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-21 22:59:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 22:59:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,437 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 22:59:46,437 INFO L226 Difference]: Without dead ends: 1706 [2020-08-21 22:59:46,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-21 22:59:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-21 22:59:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-21 22:59:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-21 22:59:46,496 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-21 22:59:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,496 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-21 22:59:46,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-21 22:59:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:46,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:59:46,500 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,501 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-21 22:59:46,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640475025] [2020-08-21 22:59:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640475025] [2020-08-21 22:59:46,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987552578] [2020-08-21 22:59:46,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,528 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-21 22:59:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,587 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-21 22:59:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,601 INFO L225 Difference]: With dead ends: 2556 [2020-08-21 22:59:46,601 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 22:59:46,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 22:59:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-21 22:59:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-21 22:59:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-21 22:59:46,679 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-21 22:59:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,680 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-21 22:59:46,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-21 22:59:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:46,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:59:46,684 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,684 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-21 22:59:46,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153541866] [2020-08-21 22:59:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153541866] [2020-08-21 22:59:46,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875403752] [2020-08-21 22:59:46,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,718 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-21 22:59:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:46,795 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-21 22:59:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:46,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:46,818 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 22:59:46,818 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 22:59:46,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 22:59:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-21 22:59:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-21 22:59:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-21 22:59:46,958 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-21 22:59:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:46,958 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-21 22:59:46,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-21 22:59:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:59:46,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:46,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:46,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:59:46,964 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-21 22:59:46,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:46,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728398622] [2020-08-21 22:59:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:46,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728398622] [2020-08-21 22:59:46,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:46,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:46,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477733610] [2020-08-21 22:59:46,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:46,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:46,992 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-21 22:59:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:47,077 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-21 22:59:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:47,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 22:59:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:47,094 INFO L225 Difference]: With dead ends: 5836 [2020-08-21 22:59:47,094 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 22:59:47,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 22:59:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-21 22:59:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-21 22:59:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-21 22:59:47,204 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-21 22:59:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:47,205 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-21 22:59:47,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-21 22:59:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:59:47,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:47,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:47,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:59:47,211 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-21 22:59:47,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:47,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815133291] [2020-08-21 22:59:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:47,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815133291] [2020-08-21 22:59:47,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:47,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:47,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772142611] [2020-08-21 22:59:47,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:47,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,232 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-21 22:59:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:47,299 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-21 22:59:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:47,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:59:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:47,315 INFO L225 Difference]: With dead ends: 5004 [2020-08-21 22:59:47,315 INFO L226 Difference]: Without dead ends: 3402 [2020-08-21 22:59:47,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-21 22:59:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-21 22:59:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-21 22:59:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-21 22:59:47,424 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-21 22:59:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:47,425 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-21 22:59:47,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-21 22:59:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:59:47,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:47,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:47,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:59:47,431 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:47,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:47,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-21 22:59:47,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:47,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880079028] [2020-08-21 22:59:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:47,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880079028] [2020-08-21 22:59:47,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:47,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:47,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032344116] [2020-08-21 22:59:47,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:47,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:47,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:47,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,467 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-21 22:59:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:47,609 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-21 22:59:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:47,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:59:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:47,663 INFO L225 Difference]: With dead ends: 9804 [2020-08-21 22:59:47,663 INFO L226 Difference]: Without dead ends: 6538 [2020-08-21 22:59:47,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-21 22:59:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-21 22:59:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 22:59:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-21 22:59:47,895 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-21 22:59:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:47,895 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-21 22:59:47,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-21 22:59:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:59:47,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:47,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:47,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 22:59:47,905 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:47,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-21 22:59:47,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:47,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816528750] [2020-08-21 22:59:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:47,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816528750] [2020-08-21 22:59:47,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:47,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:47,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762713290] [2020-08-21 22:59:47,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:47,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:47,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:47,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:47,937 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-21 22:59:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:48,071 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-21 22:59:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:48,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 22:59:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:48,090 INFO L225 Difference]: With dead ends: 7052 [2020-08-21 22:59:48,090 INFO L226 Difference]: Without dead ends: 7050 [2020-08-21 22:59:48,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-21 22:59:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-21 22:59:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 22:59:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-21 22:59:48,380 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-21 22:59:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:48,381 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-21 22:59:48,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-21 22:59:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:59:48,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:48,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:48,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 22:59:48,391 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-21 22:59:48,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:48,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304709870] [2020-08-21 22:59:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:48,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:48,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304709870] [2020-08-21 22:59:48,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:48,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:48,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061340192] [2020-08-21 22:59:48,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:48,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:48,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:48,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:48,419 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-21 22:59:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:48,591 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-21 22:59:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:48,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:59:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:48,613 INFO L225 Difference]: With dead ends: 10634 [2020-08-21 22:59:48,613 INFO L226 Difference]: Without dead ends: 10632 [2020-08-21 22:59:48,618 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 [2020-08-21 22:59:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-21 22:59:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-21 22:59:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-21 22:59:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-21 22:59:48,828 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-21 22:59:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:48,828 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-21 22:59:48,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-21 22:59:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:59:48,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:59:48,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:59:48,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 22:59:48,920 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:59:48,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:59:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-21 22:59:48,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:59:48,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712460039] [2020-08-21 22:59:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:59:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:48,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:59:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:59:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:59:48,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712460039] [2020-08-21 22:59:48,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:59:48,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:59:48,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052252266] [2020-08-21 22:59:48,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:59:48,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:59:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:59:48,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:48,947 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-21 22:59:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:59:49,131 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-21 22:59:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:59:49,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 22:59:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:59:49,132 INFO L225 Difference]: With dead ends: 22664 [2020-08-21 22:59:49,132 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:59:49,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:59:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:59:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:59:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:59:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:59:49,169 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 22:59:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:59:49,169 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:59:49,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:59:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:59:49,170 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:59:49,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 22:59:49,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:59:49,198 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:59:49,198 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:49,198 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:59:49,198 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:59:49,198 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:59:49,198 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:59:49,198 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,199 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,200 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-21 22:59:49,200 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-21 22:59:49,200 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-21 22:59:49,200 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,200 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 22:59:49,200 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,200 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-21 22:59:49,201 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-21 22:59:49,202 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-21 22:59:49,202 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-21 22:59:49,202 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,202 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,202 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,202 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-21 22:59:49,202 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,202 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,202 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 22:59:49,203 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-21 22:59:49,203 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-21 22:59:49,203 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,203 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,203 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 22:59:49,203 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-21 22:59:49,203 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,203 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 22:59:49,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:59:49 BoogieIcfgContainer [2020-08-21 22:59:49,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:59:49,222 INFO L168 Benchmark]: Toolchain (without parser) took 5987.45 ms. Allocated memory was 138.4 MB in the beginning and 370.1 MB in the end (delta: 231.7 MB). Free memory was 101.8 MB in the beginning and 212.0 MB in the end (delta: -110.2 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:49,224 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 22:59:49,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.79 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 91.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:49,225 INFO L168 Benchmark]: Boogie Preprocessor took 114.29 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 91.1 MB in the beginning and 178.2 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:49,227 INFO L168 Benchmark]: RCFGBuilder took 365.61 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 159.6 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:49,232 INFO L168 Benchmark]: TraceAbstraction took 5208.02 ms. Allocated memory was 200.8 MB in the beginning and 370.1 MB in the end (delta: 169.3 MB). Free memory was 158.9 MB in the beginning and 212.0 MB in the end (delta: -53.1 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:59:49,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.79 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 91.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.29 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 91.1 MB in the beginning and 178.2 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 365.61 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 159.6 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5208.02 ms. Allocated memory was 200.8 MB in the beginning and 370.1 MB in the end (delta: 169.3 MB). Free memory was 158.9 MB in the beginning and 212.0 MB in the end (delta: -53.1 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...