/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:35:32,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:35:32,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:35:33,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:35:33,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:35:33,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:35:33,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:35:33,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:35:33,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:35:33,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:35:33,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:35:33,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:35:33,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:35:33,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:35:33,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:35:33,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:35:33,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:35:33,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:35:33,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:35:33,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:35:33,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:35:33,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:35:33,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:35:33,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:35:33,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:35:33,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:35:33,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:35:33,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:35:33,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:35:33,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:35:33,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:35:33,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:35:33,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:35:33,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:35:33,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:35:33,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:35:33,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:35:33,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:35:33,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:35:33,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:35:33,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:35:33,075 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 [2020-09-21 12:35:33,103 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:35:33,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:35:33,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:35:33,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:35:33,105 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:35:33,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:35:33,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:35:33,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:35:33,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:35:33,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:35:33,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:35:33,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:35:33,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:35:33,107 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:35:33,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:35:33,108 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:35:33,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:35:33,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:35:33,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:35:33,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:35:33,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:35:33,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:35:33,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:35:33,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:35:33,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:35:33,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:35:33,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:35:33,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:35:33,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:35:33,111 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:35:33,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:35:33,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:35:33,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:35:33,592 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:35:33,593 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:35:33,595 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-21 12:35:33,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cab121f4/5a2ac2c135ea47608623d4f2b990828f/FLAGa3b88928b [2020-09-21 12:35:34,145 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:35:34,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-21 12:35:34,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cab121f4/5a2ac2c135ea47608623d4f2b990828f/FLAGa3b88928b [2020-09-21 12:35:34,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9cab121f4/5a2ac2c135ea47608623d4f2b990828f [2020-09-21 12:35:34,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:35:34,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:35:34,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:34,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:35:34,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:35:34,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f43d38d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34, skipping insertion in model container [2020-09-21 12:35:34,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:35:34,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:35:34,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:34,840 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:35:34,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:34,868 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:35:34,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34 WrapperNode [2020-09-21 12:35:34,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:34,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:35:34,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:35:34,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:35:34,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (1/1) ... [2020-09-21 12:35:34,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:35:34,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:35:34,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:35:34,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:35:34,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (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 [2020-09-21 12:35:35,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:35:35,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:35:35,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:35:35,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:35:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:35:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:35:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:35:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:35:35,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:35:35,257 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:35:35,258 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:35:35,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:35 BoogieIcfgContainer [2020-09-21 12:35:35,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:35:35,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:35:35,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:35:35,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:35:35,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:35:34" (1/3) ... [2020-09-21 12:35:35,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e352833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:35, skipping insertion in model container [2020-09-21 12:35:35,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:34" (2/3) ... [2020-09-21 12:35:35,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e352833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:35, skipping insertion in model container [2020-09-21 12:35:35,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:35" (3/3) ... [2020-09-21 12:35:35,271 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-21 12:35:35,281 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:35:35,290 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:35:35,312 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:35:35,345 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:35:35,345 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:35:35,345 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:35:35,345 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:35:35,345 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:35:35,346 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:35:35,346 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:35:35,346 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:35:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 12:35:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 12:35:35,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:35,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:35,372 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-09-21 12:35:35,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:35,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209926630] [2020-09-21 12:35:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:35:35,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:35,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 12:35:35,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:35:35,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:35,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:35:35,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:35,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:35,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:35,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:35,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209926630] [2020-09-21 12:35:35,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:35,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 12:35:35,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753236988] [2020-09-21 12:35:35,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 12:35:35,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:35,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 12:35:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 12:35:35,668 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-09-21 12:35:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:35,695 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-09-21 12:35:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 12:35:35,696 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 12:35:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:35,706 INFO L225 Difference]: With dead ends: 30 [2020-09-21 12:35:35,706 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 12:35:35,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 12:35:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 12:35:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 12:35:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 12:35:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 12:35:35,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-09-21 12:35:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:35,763 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 12:35:35,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 12:35:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 12:35:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 12:35:35,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:35,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:35,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:35:35,765 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-09-21 12:35:35,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:35,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880660467] [2020-09-21 12:35:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:35:35,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:35,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 12:35:35,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:35,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:35:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:35,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:35,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:35,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:35,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:35,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:35,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:35,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:35,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880660467] [2020-09-21 12:35:35,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:35,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:35:35,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406739472] [2020-09-21 12:35:35,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:35:35,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:35:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:35,861 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-09-21 12:35:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:35,898 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-09-21 12:35:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:35:35,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-21 12:35:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:35,900 INFO L225 Difference]: With dead ends: 24 [2020-09-21 12:35:35,900 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 12:35:35,902 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 [2020-09-21 12:35:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 12:35:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-09-21 12:35:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 12:35:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-09-21 12:35:35,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-09-21 12:35:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:35,908 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-09-21 12:35:35,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:35:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-09-21 12:35:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 12:35:35,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:35,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:35,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:35:35,913 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-09-21 12:35:35,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:35,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687720449] [2020-09-21 12:35:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:35,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:35:36,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:36,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-21 12:35:36,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:35:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:36,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:35:36,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:36,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:36,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:36,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:36,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:36,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:36,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687720449] [2020-09-21 12:35:36,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:36,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 12:35:36,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266700434] [2020-09-21 12:35:36,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:35:36,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:35:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:36,090 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-09-21 12:35:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:36,128 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-09-21 12:35:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:35:36,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-09-21 12:35:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:36,130 INFO L225 Difference]: With dead ends: 27 [2020-09-21 12:35:36,130 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 12:35:36,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 12:35:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-09-21 12:35:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 12:35:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 12:35:36,136 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 12:35:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:36,137 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 12:35:36,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:35:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 12:35:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 12:35:36,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:36,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:36,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:35:36,138 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-09-21 12:35:36,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:36,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623868613] [2020-09-21 12:35:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 12:35:36,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:35:36,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-09-21 12:35:36,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:35:36,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:35:36,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:35:36,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:36,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:36,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:36,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:36,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:35:36,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623868613] [2020-09-21 12:35:36,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:36,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:35:36,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723799021] [2020-09-21 12:35:36,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:35:36,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:36,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:35:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:36,363 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-09-21 12:35:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:36,393 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-09-21 12:35:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:35:36,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 12:35:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:36,395 INFO L225 Difference]: With dead ends: 27 [2020-09-21 12:35:36,395 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 12:35:36,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 12:35:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-09-21 12:35:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 12:35:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-21 12:35:36,402 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-09-21 12:35:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:36,402 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-21 12:35:36,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:35:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-21 12:35:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 12:35:36,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:36,404 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:36,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:35:36,404 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:36,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 1 times [2020-09-21 12:35:36,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:36,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447937208] [2020-09-21 12:35:36,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:35:36,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:36,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-09-21 12:35:36,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:36,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:35:36,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:35:36,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:36,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:36,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:36,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:36,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:36,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:36,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:35:36,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447937208] [2020-09-21 12:35:36,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:36,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:35:36,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499798082] [2020-09-21 12:35:36,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:35:36,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:35:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:36,873 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-21 12:35:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:36,927 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-21 12:35:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:35:36,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 12:35:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:36,931 INFO L225 Difference]: With dead ends: 30 [2020-09-21 12:35:36,931 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 12:35:36,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 12:35:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-09-21 12:35:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 12:35:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-21 12:35:36,939 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-09-21 12:35:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:36,939 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-21 12:35:36,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:35:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-21 12:35:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:35:36,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:36,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:36,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:35:36,941 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash -845939081, now seen corresponding path program 2 times [2020-09-21 12:35:36,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:36,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933138585] [2020-09-21 12:35:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:36,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:37,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:35:37,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:37,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-09-21 12:35:37,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:37,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:37,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:35:37,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:37,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:37,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:37,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:37,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:37,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:37,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:37,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:37,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:37,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:35:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:35:37,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933138585] [2020-09-21 12:35:37,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:37,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:35:37,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409328031] [2020-09-21 12:35:37,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:35:37,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:35:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:37,315 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-09-21 12:35:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:37,388 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-09-21 12:35:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:35:37,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-09-21 12:35:37,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:37,390 INFO L225 Difference]: With dead ends: 39 [2020-09-21 12:35:37,390 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 12:35:37,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 12:35:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-21 12:35:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 12:35:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-09-21 12:35:37,404 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-09-21 12:35:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:37,411 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-09-21 12:35:37,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:35:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-09-21 12:35:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:35:37,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:37,414 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:37,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:35:37,415 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2146400685, now seen corresponding path program 3 times [2020-09-21 12:35:37,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:37,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717835154] [2020-09-21 12:35:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:37,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:37,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:35:37,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:37,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-09-21 12:35:37,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:37,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:35:37,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:35:37,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:35:37,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:37,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:37,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:37,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:37,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:37,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:37,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:37,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:37,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:37,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:37,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:37,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 12:35:37,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717835154] [2020-09-21 12:35:37,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:37,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:35:37,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173943126] [2020-09-21 12:35:37,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:35:37,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:35:37,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:37,918 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-09-21 12:35:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:37,985 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-09-21 12:35:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:35:37,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-21 12:35:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:37,987 INFO L225 Difference]: With dead ends: 36 [2020-09-21 12:35:37,987 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:35:37,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:35:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-09-21 12:35:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:35:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-09-21 12:35:38,002 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-09-21 12:35:38,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:38,005 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-09-21 12:35:38,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:35:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-09-21 12:35:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:35:38,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:38,007 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:38,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:35:38,007 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:38,008 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 4 times [2020-09-21 12:35:38,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:38,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470132460] [2020-09-21 12:35:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:38,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:38,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:38,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:38,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:38,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:35:38,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:35:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-09-21 12:35:38,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:35:38,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:35:38,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:35:38,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:38,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:38,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:38,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:38,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:38,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:38,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:35:38,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:38,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:38,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:38,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:38,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 12:35:38,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470132460] [2020-09-21 12:35:38,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:38,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:35:38,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725901664] [2020-09-21 12:35:38,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:35:38,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:38,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:35:38,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:38,425 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-09-21 12:35:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:38,472 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-09-21 12:35:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:35:38,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-21 12:35:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:38,474 INFO L225 Difference]: With dead ends: 39 [2020-09-21 12:35:38,474 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 12:35:38,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 12:35:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-21 12:35:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 12:35:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-09-21 12:35:38,481 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2020-09-21 12:35:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:38,481 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-09-21 12:35:38,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:35:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-09-21 12:35:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:35:38,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:38,482 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:38,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:35:38,483 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 5 times [2020-09-21 12:35:38,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:38,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630751703] [2020-09-21 12:35:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:38,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:38,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:38,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:38,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 12:35:38,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:38,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-09-21 12:35:38,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:35:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:35:38,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:35:38,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:38,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:38,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:38,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:38,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:38,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:35:38,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:38,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 12:35:38,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630751703] [2020-09-21 12:35:38,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:38,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:35:38,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593199498] [2020-09-21 12:35:38,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:35:38,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:35:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:35:38,735 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-09-21 12:35:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:38,783 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-09-21 12:35:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:35:38,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-21 12:35:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:38,785 INFO L225 Difference]: With dead ends: 40 [2020-09-21 12:35:38,785 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 12:35:38,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:35:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 12:35:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-21 12:35:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:35:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-09-21 12:35:38,791 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-09-21 12:35:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:38,791 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-09-21 12:35:38,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:35:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-09-21 12:35:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 12:35:38,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:38,793 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:38,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:35:38,793 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:38,794 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 6 times [2020-09-21 12:35:38,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:38,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239498295] [2020-09-21 12:35:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:35:38,803 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:35:38,804 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:35:38,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:35:38,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:35:38 BoogieIcfgContainer [2020-09-21 12:35:38,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:35:38,831 INFO L168 Benchmark]: Toolchain (without parser) took 4316.23 ms. Allocated memory was 139.5 MB in the beginning and 246.9 MB in the end (delta: 107.5 MB). Free memory was 102.4 MB in the beginning and 148.5 MB in the end (delta: -46.1 MB). Peak memory consumption was 61.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:38,832 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-21 12:35:38,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.05 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:38,833 INFO L168 Benchmark]: Boogie Preprocessor took 108.90 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 182.4 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:38,834 INFO L168 Benchmark]: RCFGBuilder took 280.33 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:38,835 INFO L168 Benchmark]: TraceAbstraction took 3564.34 ms. Allocated memory was 202.4 MB in the beginning and 246.9 MB in the end (delta: 44.6 MB). Free memory was 169.3 MB in the beginning and 148.5 MB in the end (delta: 20.8 MB). Peak memory consumption was 65.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:38,839 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 350.05 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.90 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 182.4 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.33 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3564.34 ms. Allocated memory was 202.4 MB in the beginning and 246.9 MB in the end (delta: 44.6 MB). Free memory was 169.3 MB in the beginning and 148.5 MB in the end (delta: 20.8 MB). Peak memory consumption was 65.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 54 SDslu, 200 SDs, 0 SdLazy, 134 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 10 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 6009 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 138/196 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 incorrect! Received shutdown request...