/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=LOWLEXORDER --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 18:09:10,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:09:10,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:09:10,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:09:10,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:09:10,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:09:10,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:09:10,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:09:10,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:09:10,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:09:10,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:09:10,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:09:10,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:09:10,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:09:10,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:09:10,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:09:10,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:09:10,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:09:10,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:09:10,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:09:10,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:09:10,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:09:10,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:09:10,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:09:10,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:09:10,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:09:10,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:09:10,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:09:10,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:09:10,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:09:10,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:09:10,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:09:10,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:09:10,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:09:10,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:09:10,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:09:10,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:09:10,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:09:10,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:09:10,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:09:10,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:09:10,895 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 18:09:10,936 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:09:10,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:09:10,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:09:10,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:09:10,939 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:09:10,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:09:10,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:09:10,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:09:10,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:09:10,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:09:10,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:09:10,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:09:10,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:09:10,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:09:10,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:09:10,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:09:10,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:09:10,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:09:10,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:09:10,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:09:10,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:09:10,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:09:10,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:09:10,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:09:10,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:09:10,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:09:10,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:09:10,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:09:10,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:09:10,946 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:09:11,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:09:11,248 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:09:11,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:09:11,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:09:11,253 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:09:11,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 18:09:11,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a218e505/bc56e78254fa4f4dac73c7fcf2f99d72/FLAGd07c58b8b [2020-08-21 18:09:11,807 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:09:11,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 18:09:11,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a218e505/bc56e78254fa4f4dac73c7fcf2f99d72/FLAGd07c58b8b [2020-08-21 18:09:12,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a218e505/bc56e78254fa4f4dac73c7fcf2f99d72 [2020-08-21 18:09:12,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:09:12,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:09:12,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:12,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:09:12,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:09:12,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2c32e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12, skipping insertion in model container [2020-08-21 18:09:12,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:09:12,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:09:12,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:12,420 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:09:12,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:12,465 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:09:12,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12 WrapperNode [2020-08-21 18:09:12,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:12,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:09:12,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:09:12,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:09:12,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:09:12,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:09:12,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:09:12,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:09:12,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (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 18:09:12,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:09:12,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:09:12,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:09:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:09:12,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:09:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:09:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:09:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:09:12,949 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:09:12,949 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:09:12,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:12 BoogieIcfgContainer [2020-08-21 18:09:12,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:09:12,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:09:12,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:09:12,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:09:12,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:09:12" (1/3) ... [2020-08-21 18:09:12,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4167dfac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:12, skipping insertion in model container [2020-08-21 18:09:12,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (2/3) ... [2020-08-21 18:09:12,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4167dfac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:12, skipping insertion in model container [2020-08-21 18:09:12,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:12" (3/3) ... [2020-08-21 18:09:12,966 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-21 18:09:12,981 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:09:12,992 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:09:13,012 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:09:13,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:09:13,042 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:09:13,042 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:09:13,042 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:09:13,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:09:13,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:09:13,043 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:09:13,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:09:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-21 18:09:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:09:13,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:13,074 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 18:09:13,074 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:13,082 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-21 18:09:13,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:13,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052082882] [2020-08-21 18:09:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,276 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 18:09:13,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052082882] [2020-08-21 18:09:13,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:13,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:13,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384201097] [2020-08-21 18:09:13,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:13,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:13,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:13,303 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-21 18:09:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:13,383 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-21 18:09:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:13,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 18:09:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:13,397 INFO L225 Difference]: With dead ends: 81 [2020-08-21 18:09:13,397 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 18:09:13,401 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 18:09:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 18:09:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-21 18:09:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 18:09:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-21 18:09:13,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-21 18:09:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:13,443 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-21 18:09:13,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-21 18:09:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:09:13,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:13,445 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 18:09:13,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:09:13,446 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:13,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:13,446 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-21 18:09:13,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:13,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121162637] [2020-08-21 18:09:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,512 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 18:09:13,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121162637] [2020-08-21 18:09:13,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:13,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:13,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899581482] [2020-08-21 18:09:13,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:13,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:13,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:13,517 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-21 18:09:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:13,547 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-21 18:09:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:13,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 18:09:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:13,550 INFO L225 Difference]: With dead ends: 107 [2020-08-21 18:09:13,550 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 18:09:13,551 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 18:09:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 18:09:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-21 18:09:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 18:09:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-21 18:09:13,571 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-21 18:09:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:13,571 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-21 18:09:13,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-21 18:09:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:09:13,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:13,574 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 18:09:13,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:09:13,575 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-21 18:09:13,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:13,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958752878] [2020-08-21 18:09:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,677 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 18:09:13,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958752878] [2020-08-21 18:09:13,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:13,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:13,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592486679] [2020-08-21 18:09:13,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:13,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:13,680 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-21 18:09:13,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:13,708 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-21 18:09:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:13,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:09:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:13,710 INFO L225 Difference]: With dead ends: 99 [2020-08-21 18:09:13,710 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 18:09:13,711 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 18:09:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 18:09:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-21 18:09:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 18:09:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-21 18:09:13,722 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-21 18:09:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:13,722 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-21 18:09:13,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-21 18:09:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:09:13,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:13,724 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 18:09:13,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:09:13,725 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-21 18:09:13,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:13,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452884130] [2020-08-21 18:09:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,779 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 18:09:13,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452884130] [2020-08-21 18:09:13,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:13,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:13,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162498617] [2020-08-21 18:09:13,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:13,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:13,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:13,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:13,782 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-21 18:09:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:13,807 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-21 18:09:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:13,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:09:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:13,810 INFO L225 Difference]: With dead ends: 124 [2020-08-21 18:09:13,810 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 18:09:13,811 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 18:09:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 18:09:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-21 18:09:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 18:09:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-21 18:09:13,827 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-21 18:09:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:13,827 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-21 18:09:13,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-21 18:09:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:09:13,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:13,829 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 18:09:13,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:09:13,830 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-21 18:09:13,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:13,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469396494] [2020-08-21 18:09:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,868 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 18:09:13,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469396494] [2020-08-21 18:09:13,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:13,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:13,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520267192] [2020-08-21 18:09:13,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:13,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:13,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:13,871 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-21 18:09:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:13,899 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-21 18:09:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:13,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:09:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:13,902 INFO L225 Difference]: With dead ends: 204 [2020-08-21 18:09:13,902 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 18:09:13,903 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 18:09:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 18:09:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-21 18:09:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 18:09:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-21 18:09:13,918 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-21 18:09:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:13,918 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-21 18:09:13,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-21 18:09:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:09:13,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:13,920 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] [2020-08-21 18:09:13,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:09:13,921 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:13,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-21 18:09:13,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:13,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017930852] [2020-08-21 18:09:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:13,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,000 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 18:09:14,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017930852] [2020-08-21 18:09:14,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49875242] [2020-08-21 18:09:14,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,004 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-21 18:09:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,029 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-21 18:09:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:09:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,032 INFO L225 Difference]: With dead ends: 183 [2020-08-21 18:09:14,032 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 18:09:14,033 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 18:09:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 18:09:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-21 18:09:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 18:09:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-21 18:09:14,049 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-21 18:09:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,050 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-21 18:09:14,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-21 18:09:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:09:14,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,052 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 18:09:14,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:09:14,052 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-21 18:09:14,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347526762] [2020-08-21 18:09:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,120 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 18:09:14,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347526762] [2020-08-21 18:09:14,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417456678] [2020-08-21 18:09:14,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,123 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-21 18:09:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,141 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-21 18:09:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:09:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,144 INFO L225 Difference]: With dead ends: 228 [2020-08-21 18:09:14,144 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 18:09:14,145 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 18:09:14,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 18:09:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-21 18:09:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 18:09:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-21 18:09:14,160 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-21 18:09:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,160 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-21 18:09:14,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-21 18:09:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:09:14,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,162 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 18:09:14,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:09:14,163 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-21 18:09:14,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744430816] [2020-08-21 18:09:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,191 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 18:09:14,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744430816] [2020-08-21 18:09:14,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254361055] [2020-08-21 18:09:14,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,194 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-21 18:09:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,222 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-21 18:09:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:09:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,225 INFO L225 Difference]: With dead ends: 392 [2020-08-21 18:09:14,225 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 18:09:14,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 18:09:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-21 18:09:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 18:09:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-21 18:09:14,250 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-21 18:09:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,251 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-21 18:09:14,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-21 18:09:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:09:14,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,253 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 18:09:14,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:09:14,253 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-21 18:09:14,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306649252] [2020-08-21 18:09:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,308 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 18:09:14,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306649252] [2020-08-21 18:09:14,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308394263] [2020-08-21 18:09:14,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,311 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-21 18:09:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,330 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-21 18:09:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:09:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,333 INFO L225 Difference]: With dead ends: 348 [2020-08-21 18:09:14,333 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 18:09:14,334 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 18:09:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 18:09:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-21 18:09:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-21 18:09:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-21 18:09:14,346 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-21 18:09:14,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,347 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-21 18:09:14,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-21 18:09:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:09:14,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,349 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 18:09:14,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:09:14,350 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,350 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-21 18:09:14,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125224159] [2020-08-21 18:09:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,383 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 18:09:14,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125224159] [2020-08-21 18:09:14,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067204418] [2020-08-21 18:09:14,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,387 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-21 18:09:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,428 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-21 18:09:14,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:09:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,434 INFO L225 Difference]: With dead ends: 428 [2020-08-21 18:09:14,434 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 18:09:14,435 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 18:09:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 18:09:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-21 18:09:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-21 18:09:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-21 18:09:14,451 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-21 18:09:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,453 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-21 18:09:14,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-21 18:09:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:09:14,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,461 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 18:09:14,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:09:14,461 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,461 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-21 18:09:14,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248156252] [2020-08-21 18:09:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,497 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 18:09:14,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248156252] [2020-08-21 18:09:14,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978781241] [2020-08-21 18:09:14,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,500 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-21 18:09:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,532 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-21 18:09:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:09:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,536 INFO L225 Difference]: With dead ends: 764 [2020-08-21 18:09:14,536 INFO L226 Difference]: Without dead ends: 450 [2020-08-21 18:09:14,537 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 18:09:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-21 18:09:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-21 18:09:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-21 18:09:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-21 18:09:14,555 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-21 18:09:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,555 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-21 18:09:14,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-21 18:09:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:09:14,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:14,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:09:14,558 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-21 18:09:14,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572695891] [2020-08-21 18:09:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,581 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 18:09:14,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572695891] [2020-08-21 18:09:14,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622024474] [2020-08-21 18:09:14,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,584 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-21 18:09:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,604 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-21 18:09:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:09:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,608 INFO L225 Difference]: With dead ends: 672 [2020-08-21 18:09:14,608 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 18:09:14,609 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 18:09:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 18:09:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-21 18:09:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 18:09:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-21 18:09:14,624 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-21 18:09:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,625 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-21 18:09:14,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-21 18:09:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:09:14,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,626 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 18:09:14,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:09:14,627 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-21 18:09:14,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851910678] [2020-08-21 18:09:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,656 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 18:09:14,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851910678] [2020-08-21 18:09:14,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329081074] [2020-08-21 18:09:14,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,658 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-21 18:09:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,697 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-21 18:09:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:09:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,703 INFO L225 Difference]: With dead ends: 812 [2020-08-21 18:09:14,703 INFO L226 Difference]: Without dead ends: 810 [2020-08-21 18:09:14,704 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 18:09:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-21 18:09:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-21 18:09:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-21 18:09:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-21 18:09:14,724 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-21 18:09:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,725 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-21 18:09:14,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-21 18:09:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:09:14,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,727 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 18:09:14,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:09:14,727 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-21 18:09:14,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803558452] [2020-08-21 18:09:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,787 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 18:09:14,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803558452] [2020-08-21 18:09:14,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714677266] [2020-08-21 18:09:14,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,790 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-21 18:09:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,822 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-21 18:09:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:09:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,829 INFO L225 Difference]: With dead ends: 1500 [2020-08-21 18:09:14,829 INFO L226 Difference]: Without dead ends: 874 [2020-08-21 18:09:14,832 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 18:09:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-21 18:09:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-21 18:09:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 18:09:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-21 18:09:14,867 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-21 18:09:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,867 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-21 18:09:14,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-21 18:09:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:09:14,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:14,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:09:14,870 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,870 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-21 18:09:14,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396759585] [2020-08-21 18:09:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,904 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 18:09:14,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396759585] [2020-08-21 18:09:14,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:14,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907927683] [2020-08-21 18:09:14,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:14,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:14,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:14,910 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-21 18:09:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,953 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-21 18:09:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:14,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:09:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,959 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 18:09:14,959 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 18:09:14,962 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 18:09:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 18:09:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-21 18:09:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-21 18:09:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-21 18:09:15,037 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-21 18:09:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:15,038 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-21 18:09:15,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-21 18:09:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:09:15,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:15,041 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 18:09:15,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:09:15,041 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-21 18:09:15,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:15,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995350665] [2020-08-21 18:09:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,078 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 18:09:15,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995350665] [2020-08-21 18:09:15,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:15,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:15,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581937549] [2020-08-21 18:09:15,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:15,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:15,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:15,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:15,084 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-21 18:09:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:15,132 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-21 18:09:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:15,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:09:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:15,144 INFO L225 Difference]: With dead ends: 1548 [2020-08-21 18:09:15,144 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 18:09:15,146 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 18:09:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 18:09:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-21 18:09:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-21 18:09:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-21 18:09:15,210 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-21 18:09:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:15,211 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-21 18:09:15,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-21 18:09:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:09:15,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:15,214 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 18:09:15,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:09:15,214 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:15,215 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-21 18:09:15,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:15,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113516561] [2020-08-21 18:09:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,250 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 18:09:15,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113516561] [2020-08-21 18:09:15,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:15,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:15,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403680740] [2020-08-21 18:09:15,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:15,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:15,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:15,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:15,252 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-21 18:09:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:15,306 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-21 18:09:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:15,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:09:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:15,315 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 18:09:15,316 INFO L226 Difference]: Without dead ends: 1706 [2020-08-21 18:09:15,320 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 18:09:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-21 18:09:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-21 18:09:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-21 18:09:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-21 18:09:15,377 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-21 18:09:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:15,377 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-21 18:09:15,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-21 18:09:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:09:15,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:15,381 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 18:09:15,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:09:15,381 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:15,381 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-21 18:09:15,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:15,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92605856] [2020-08-21 18:09:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,408 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 18:09:15,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92605856] [2020-08-21 18:09:15,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:15,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:15,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197608980] [2020-08-21 18:09:15,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:15,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:15,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:15,413 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-21 18:09:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:15,459 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-21 18:09:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:15,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:09:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:15,468 INFO L225 Difference]: With dead ends: 2556 [2020-08-21 18:09:15,468 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 18:09:15,471 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 18:09:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 18:09:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-21 18:09:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-21 18:09:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-21 18:09:15,527 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-21 18:09:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:15,527 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-21 18:09:15,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-21 18:09:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:09:15,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:15,530 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 18:09:15,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 18:09:15,531 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-21 18:09:15,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:15,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414114409] [2020-08-21 18:09:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,554 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 18:09:15,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414114409] [2020-08-21 18:09:15,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:15,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:15,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583840611] [2020-08-21 18:09:15,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:15,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:15,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:15,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:15,556 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-21 18:09:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:15,636 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-21 18:09:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:15,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:09:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:15,650 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 18:09:15,651 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 18:09:15,652 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 18:09:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 18:09:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-21 18:09:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-21 18:09:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-21 18:09:15,745 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-21 18:09:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:15,745 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-21 18:09:15,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-21 18:09:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:09:15,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:15,750 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 18:09:15,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 18:09:15,751 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:15,751 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-21 18:09:15,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:15,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996075075] [2020-08-21 18:09:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,778 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 18:09:15,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996075075] [2020-08-21 18:09:15,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:15,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:15,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755548785] [2020-08-21 18:09:15,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:15,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:15,781 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-21 18:09:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:15,887 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-21 18:09:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:15,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:09:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:15,909 INFO L225 Difference]: With dead ends: 5836 [2020-08-21 18:09:15,909 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 18:09:15,915 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 18:09:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 18:09:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-21 18:09:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-21 18:09:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-21 18:09:16,049 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-21 18:09:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:16,049 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-21 18:09:16,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-21 18:09:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:09:16,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:16,055 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 18:09:16,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 18:09:16,055 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:16,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-21 18:09:16,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:16,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602088459] [2020-08-21 18:09:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,076 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 18:09:16,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602088459] [2020-08-21 18:09:16,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:16,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:16,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397495197] [2020-08-21 18:09:16,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:16,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:16,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:16,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:16,078 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-21 18:09:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:16,154 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-21 18:09:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:16,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:09:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:16,170 INFO L225 Difference]: With dead ends: 5004 [2020-08-21 18:09:16,171 INFO L226 Difference]: Without dead ends: 3402 [2020-08-21 18:09:16,175 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 18:09:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-21 18:09:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-21 18:09:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-21 18:09:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-21 18:09:16,322 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-21 18:09:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:16,322 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-21 18:09:16,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-21 18:09:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:09:16,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:16,327 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 18:09:16,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 18:09:16,328 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-21 18:09:16,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:16,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238609333] [2020-08-21 18:09:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,351 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 18:09:16,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238609333] [2020-08-21 18:09:16,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:16,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:16,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147969757] [2020-08-21 18:09:16,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:16,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:16,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:16,353 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-21 18:09:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:16,468 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-21 18:09:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:16,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:09:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:16,501 INFO L225 Difference]: With dead ends: 9804 [2020-08-21 18:09:16,502 INFO L226 Difference]: Without dead ends: 6538 [2020-08-21 18:09:16,511 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 18:09:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-21 18:09:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-21 18:09:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 18:09:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-21 18:09:16,718 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-21 18:09:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:16,718 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-21 18:09:16,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-21 18:09:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:09:16,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:16,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:16,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 18:09:16,728 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-21 18:09:16,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:16,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886112426] [2020-08-21 18:09:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,752 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 18:09:16,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886112426] [2020-08-21 18:09:16,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:16,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:16,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763975908] [2020-08-21 18:09:16,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:16,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:16,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:16,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:16,754 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-21 18:09:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:16,911 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-21 18:09:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:16,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:09:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:16,926 INFO L225 Difference]: With dead ends: 7052 [2020-08-21 18:09:16,926 INFO L226 Difference]: Without dead ends: 7050 [2020-08-21 18:09:16,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-21 18:09:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-21 18:09:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 18:09:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-21 18:09:17,116 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-21 18:09:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:17,117 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-21 18:09:17,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-21 18:09:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:09:17,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:17,126 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 18:09:17,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 18:09:17,127 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-21 18:09:17,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:17,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304237422] [2020-08-21 18:09:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,150 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 18:09:17,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304237422] [2020-08-21 18:09:17,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:17,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:17,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498057463] [2020-08-21 18:09:17,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:17,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:17,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:17,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:17,153 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-21 18:09:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:17,384 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-21 18:09:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:17,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:09:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:17,408 INFO L225 Difference]: With dead ends: 10634 [2020-08-21 18:09:17,408 INFO L226 Difference]: Without dead ends: 10632 [2020-08-21 18:09:17,410 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 18:09:17,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-21 18:09:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-21 18:09:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-21 18:09:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-21 18:09:17,625 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-21 18:09:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:17,625 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-21 18:09:17,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-21 18:09:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:09:17,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:17,641 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 18:09:17,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 18:09:17,641 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-21 18:09:17,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:17,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241098719] [2020-08-21 18:09:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:17,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241098719] [2020-08-21 18:09:17,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:17,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:17,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410964020] [2020-08-21 18:09:17,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:17,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:17,663 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-21 18:09:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:17,856 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-21 18:09:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:17,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:09:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:17,857 INFO L225 Difference]: With dead ends: 22664 [2020-08-21 18:09:17,857 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:09:17,894 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 18:09:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:09:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:09:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:09:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:09:17,896 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 18:09:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:17,896 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:09:17,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:09:17,897 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:09:17,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 18:09:17,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:09:17,960 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:09:17,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:09:17,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:09:17,960 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:09:17,960 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:09:17,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,961 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-21 18:09:17,962 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-21 18:09:17,962 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-21 18:09:17,962 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,962 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 18:09:17,962 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,962 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-21 18:09:17,962 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-21 18:09:17,962 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-21 18:09:17,963 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-21 18:09:17,963 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,963 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,963 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,963 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-21 18:09:17,963 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,963 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,963 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 18:09:17,963 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-21 18:09:17,964 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-21 18:09:17,964 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,964 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,964 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 18:09:17,964 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-21 18:09:17,964 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,964 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 18:09:17,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:09:17 BoogieIcfgContainer [2020-08-21 18:09:17,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:09:17,979 INFO L168 Benchmark]: Toolchain (without parser) took 5776.68 ms. Allocated memory was 141.0 MB in the beginning and 335.5 MB in the end (delta: 194.5 MB). Free memory was 102.6 MB in the beginning and 291.1 MB in the end (delta: -188.4 MB). Peak memory consumption was 208.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:17,980 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:09:17,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.50 ms. Allocated memory is still 141.0 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:17,981 INFO L168 Benchmark]: Boogie Preprocessor took 128.21 ms. Allocated memory was 141.0 MB in the beginning and 206.0 MB in the end (delta: 65.0 MB). Free memory was 92.0 MB in the beginning and 183.5 MB in the end (delta: -91.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:17,982 INFO L168 Benchmark]: RCFGBuilder took 358.86 ms. Allocated memory is still 206.0 MB. Free memory was 183.5 MB in the beginning and 165.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:17,982 INFO L168 Benchmark]: TraceAbstraction took 5019.69 ms. Allocated memory was 206.0 MB in the beginning and 335.5 MB in the end (delta: 129.5 MB). Free memory was 164.6 MB in the beginning and 291.1 MB in the end (delta: -126.5 MB). Peak memory consumption was 205.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:17,985 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.50 ms. Allocated memory is still 141.0 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.21 ms. Allocated memory was 141.0 MB in the beginning and 206.0 MB in the end (delta: 65.0 MB). Free memory was 92.0 MB in the beginning and 183.5 MB in the end (delta: -91.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.86 ms. Allocated memory is still 206.0 MB. Free memory was 183.5 MB in the beginning and 165.2 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5019.69 ms. Allocated memory was 206.0 MB in the beginning and 335.5 MB in the end (delta: 129.5 MB). Free memory was 164.6 MB in the beginning and 291.1 MB in the end (delta: -126.5 MB). Peak memory consumption was 205.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s 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...