/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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 interpolation-heuristic=FIRST --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/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:10:16,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:10:16,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:10:17,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:10:17,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:10:17,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:10:17,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:10:17,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:10:17,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:10:17,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:10:17,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:10:17,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:10:17,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:10:17,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:10:17,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:10:17,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:10:17,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:10:17,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:10:17,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:10:17,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:10:17,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:10:17,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:10:17,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:10:17,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:10:17,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:10:17,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:10:17,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:10:17,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:10:17,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:10:17,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:10:17,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:10:17,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:10:17,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:10:17,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:10:17,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:10:17,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:10:17,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:10:17,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:10:17,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:10:17,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:10:17,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:10:17,093 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 [2020-09-24 16:10:17,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:10:17,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:10:17,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:10:17,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:10:17,133 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:10:17,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:10:17,133 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:10:17,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:10:17,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:10:17,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:10:17,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:10:17,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:10:17,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:10:17,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:10:17,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:10:17,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:10:17,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:10:17,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:10:17,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:10:17,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:10:17,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:10:17,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:17,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:10:17,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:10:17,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:10:17,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:10:17,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:10:17,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:10:17,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:10:17,138 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.rcfgbuilder: Size of a code block -> SingleStatement 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-24 16:10:17,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:10:17,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:10:17,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:10:17,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:10:17,603 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:10:17,604 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 16:10:17,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca6b8e55c/1224a8b7c7fb4b9ba0e17e98d99c9dd0/FLAG3646ca12f [2020-09-24 16:10:18,244 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:10:18,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 16:10:18,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca6b8e55c/1224a8b7c7fb4b9ba0e17e98d99c9dd0/FLAG3646ca12f [2020-09-24 16:10:18,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca6b8e55c/1224a8b7c7fb4b9ba0e17e98d99c9dd0 [2020-09-24 16:10:18,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:10:18,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:10:18,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:18,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:10:18,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:10:18,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:18,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18, skipping insertion in model container [2020-09-24 16:10:18,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:18,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:10:18,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:10:18,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:18,878 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:10:18,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:18,918 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:10:18,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18 WrapperNode [2020-09-24 16:10:18,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:18,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:10:18,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:10:18,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:10:18,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:18,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:18,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:18,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:18,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:18,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:18,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (1/1) ... [2020-09-24 16:10:19,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:10:19,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:10:19,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:10:19,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:10:19,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (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 [2020-09-24 16:10:19,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:10:19,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:10:19,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:10:19,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:10:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:10:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:10:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 16:10:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:10:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:10:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:10:19,340 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:10:19,341 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:10:19,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:19 BoogieIcfgContainer [2020-09-24 16:10:19,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:10:19,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:10:19,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:10:19,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:10:19,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:18" (1/3) ... [2020-09-24 16:10:19,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6726b1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:19, skipping insertion in model container [2020-09-24 16:10:19,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:18" (2/3) ... [2020-09-24 16:10:19,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6726b1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:19, skipping insertion in model container [2020-09-24 16:10:19,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:19" (3/3) ... [2020-09-24 16:10:19,358 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-24 16:10:19,371 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:10:19,383 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:10:19,437 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:10:19,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:10:19,484 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:10:19,485 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:10:19,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:10:19,485 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:10:19,485 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:10:19,485 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:10:19,485 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:10:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-24 16:10:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 16:10:19,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:19,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:19,516 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:19,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:19,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-24 16:10:19,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:19,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2343301] [2020-09-24 16:10:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:19,661 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:19,661 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:19,661 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:19,662 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:19,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 16:10:19,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:19,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 16:10:19,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 16:10:19,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:19,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:19,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:19,701 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:19,702 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:19,702 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:19,702 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:19,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:19,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:19,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:19,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:19,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2343301] [2020-09-24 16:10:19,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:19,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 16:10:19,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334021342] [2020-09-24 16:10:19,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 16:10:19,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 16:10:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 16:10:19,742 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-09-24 16:10:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:19,773 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-24 16:10:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 16:10:19,775 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-24 16:10:19,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:19,787 INFO L225 Difference]: With dead ends: 37 [2020-09-24 16:10:19,787 INFO L226 Difference]: Without dead ends: 20 [2020-09-24 16:10:19,792 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 [2020-09-24 16:10:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-24 16:10:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-24 16:10:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 16:10:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-24 16:10:19,834 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-09-24 16:10:19,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:19,834 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-24 16:10:19,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 16:10:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-24 16:10:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 16:10:19,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:19,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:19,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:10:19,836 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1869128626, now seen corresponding path program 1 times [2020-09-24 16:10:19,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:19,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163484087] [2020-09-24 16:10:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:19,896 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:19,897 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:19,897 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:19,898 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:19,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 16:10:19,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:19,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 16:10:19,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 16:10:19,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 16:10:19,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:19,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:19,983 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:19,984 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:19,984 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:19,984 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:19,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:19,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:19,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:19,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:19,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:19,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:19,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:19,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:19,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163484087] [2020-09-24 16:10:19,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:19,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:10:19,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138827021] [2020-09-24 16:10:19,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:10:19,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:19,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:10:19,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:19,995 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-24 16:10:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:20,045 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-24 16:10:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:10:20,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 16:10:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:20,048 INFO L225 Difference]: With dead ends: 31 [2020-09-24 16:10:20,048 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 16:10:20,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 16:10:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-24 16:10:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 16:10:20,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-24 16:10:20,057 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-24 16:10:20,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:20,057 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-24 16:10:20,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:10:20,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-24 16:10:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 16:10:20,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:20,059 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] [2020-09-24 16:10:20,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:10:20,059 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-24 16:10:20,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:20,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160157155] [2020-09-24 16:10:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,149 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,149 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,150 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,150 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 16:10:20,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 16:10:20,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:20,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 16:10:20,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 16:10:20,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:20,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,498 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,499 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,499 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,499 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:20,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:20,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:20,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:20,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160157155] [2020-09-24 16:10:20,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:20,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:10:20,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338055898] [2020-09-24 16:10:20,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:10:20,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:20,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:10:20,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:10:20,520 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-24 16:10:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:20,863 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-09-24 16:10:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:10:20,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 16:10:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:20,865 INFO L225 Difference]: With dead ends: 50 [2020-09-24 16:10:20,865 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 16:10:20,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 16:10:20,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-24 16:10:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 16:10:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-24 16:10:20,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-24 16:10:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:20,874 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-24 16:10:20,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:10:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-24 16:10:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 16:10:20,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:20,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:20,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:10:20,876 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-24 16:10:20,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:20,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536649000] [2020-09-24 16:10:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,901 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,902 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,902 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,902 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 16:10:20,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 16:10:20,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:20,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:20,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 16:10:20,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:20,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:20,943 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:20,943 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:20,943 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:20,944 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:20,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:20,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:20,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:20,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:20,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:20,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536649000] [2020-09-24 16:10:20,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:20,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 16:10:20,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356047717] [2020-09-24 16:10:20,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:10:20,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:20,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:10:20,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:20,951 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-24 16:10:21,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:21,004 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-24 16:10:21,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:10:21,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-24 16:10:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:21,006 INFO L225 Difference]: With dead ends: 42 [2020-09-24 16:10:21,006 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 16:10:21,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 16:10:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-24 16:10:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 16:10:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 16:10:21,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-24 16:10:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:21,014 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 16:10:21,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:10:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 16:10:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 16:10:21,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:21,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:21,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:10:21,016 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-24 16:10:21,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:21,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845637382] [2020-09-24 16:10:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:21,168 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:21,168 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:21,169 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:21,169 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:21,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 16:10:21,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:21,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-24 16:10:21,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:21,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 16:10:21,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 16:10:21,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 16:10:21,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:21,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:21,467 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:21,468 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:21,468 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:21,468 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:21,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:21,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:21,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:21,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:21,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:21,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845637382] [2020-09-24 16:10:21,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:21,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 16:10:21,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240628618] [2020-09-24 16:10:21,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 16:10:21,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 16:10:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 16:10:21,477 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-24 16:10:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:21,874 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-09-24 16:10:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 16:10:21,875 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 16:10:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:21,876 INFO L225 Difference]: With dead ends: 43 [2020-09-24 16:10:21,876 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 16:10:21,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 16:10:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 16:10:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-09-24 16:10:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 16:10:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-24 16:10:21,884 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-09-24 16:10:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:21,884 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-24 16:10:21,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 16:10:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-24 16:10:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 16:10:21,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:21,886 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:21,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:10:21,886 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-24 16:10:21,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:21,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000338624] [2020-09-24 16:10:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:21,907 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:21,908 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:21,908 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:21,908 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:21,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 16:10:21,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:21,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 16:10:21,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:21,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:21,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:21,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 16:10:21,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:21,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:21,953 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:21,953 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:21,953 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:21,954 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:21,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:21,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:21,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:21,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:21,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:21,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:21,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000338624] [2020-09-24 16:10:21,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:21,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:10:21,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116304623] [2020-09-24 16:10:21,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:10:21,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:21,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:10:21,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:21,961 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2020-09-24 16:10:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:22,042 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-24 16:10:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:10:22,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-24 16:10:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:22,044 INFO L225 Difference]: With dead ends: 54 [2020-09-24 16:10:22,044 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 16:10:22,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:10:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 16:10:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-09-24 16:10:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 16:10:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-24 16:10:22,052 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-09-24 16:10:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:22,053 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-24 16:10:22,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:10:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-24 16:10:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 16:10:22,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:22,055 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:22,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:10:22,055 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:22,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:22,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-24 16:10:22,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:22,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474341510] [2020-09-24 16:10:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,087 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,088 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,088 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,088 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 16:10:22,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 16:10:22,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:22,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:22,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 16:10:22,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:22,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,158 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,158 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,159 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,159 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:22,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:22,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:22,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:22,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:22,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:22,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474341510] [2020-09-24 16:10:22,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:22,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:10:22,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458869976] [2020-09-24 16:10:22,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:10:22,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:10:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:10:22,167 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-24 16:10:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:22,271 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-24 16:10:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:10:22,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-24 16:10:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:22,273 INFO L225 Difference]: With dead ends: 60 [2020-09-24 16:10:22,274 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 16:10:22,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:10:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 16:10:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-24 16:10:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 16:10:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-24 16:10:22,282 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-24 16:10:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:22,282 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-24 16:10:22,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:10:22,282 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-24 16:10:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 16:10:22,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:22,284 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:22,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:10:22,284 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:22,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-24 16:10:22,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:22,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117628025] [2020-09-24 16:10:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,319 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,320 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,320 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,320 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 16:10:22,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 16:10:22,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:22,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:22,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 16:10:22,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:22,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,412 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,412 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,412 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,412 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:22,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:22,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:22,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:22,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:22,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:22,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117628025] [2020-09-24 16:10:22,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:22,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:10:22,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278151054] [2020-09-24 16:10:22,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:10:22,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:22,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:10:22,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:10:22,421 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-24 16:10:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:22,564 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-24 16:10:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:10:22,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-24 16:10:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:22,566 INFO L225 Difference]: With dead ends: 66 [2020-09-24 16:10:22,566 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 16:10:22,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:10:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 16:10:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-24 16:10:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 16:10:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-24 16:10:22,574 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-24 16:10:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:22,574 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-24 16:10:22,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:10:22,575 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-24 16:10:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 16:10:22,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:22,576 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:22,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:10:22,576 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:22,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-24 16:10:22,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:22,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895365634] [2020-09-24 16:10:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,619 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,620 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,620 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,620 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 16:10:22,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 16:10:22,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:10:22,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:22,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 16:10:22,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:22,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:22,753 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:22,753 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:22,753 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:22,753 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:22,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:22,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:22,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:22,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:22,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:22,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:22,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:22,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:22,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895365634] [2020-09-24 16:10:22,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:22,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:10:22,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738397203] [2020-09-24 16:10:22,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:10:22,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:22,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:10:22,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:10:22,762 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-24 16:10:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:22,951 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-24 16:10:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:10:22,953 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-24 16:10:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:22,955 INFO L225 Difference]: With dead ends: 72 [2020-09-24 16:10:22,957 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 16:10:22,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:10:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 16:10:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-24 16:10:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 16:10:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-24 16:10:22,971 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-24 16:10:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:22,972 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-24 16:10:22,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:10:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-24 16:10:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 16:10:22,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:22,975 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:22,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:10:22,975 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-24 16:10:22,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:22,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894635909] [2020-09-24 16:10:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,037 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,038 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,038 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,038 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 16:10:23,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 16:10:23,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:10:23,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:23,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 16:10:23,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:23,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,214 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,214 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,214 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,214 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:23,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:23,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:23,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:23,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894635909] [2020-09-24 16:10:23,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:23,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 16:10:23,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701348820] [2020-09-24 16:10:23,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 16:10:23,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 16:10:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:10:23,222 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-24 16:10:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:23,480 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-24 16:10:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:10:23,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-24 16:10:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:23,482 INFO L225 Difference]: With dead ends: 78 [2020-09-24 16:10:23,482 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 16:10:23,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:10:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 16:10:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-24 16:10:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 16:10:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-24 16:10:23,499 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-24 16:10:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:23,499 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-24 16:10:23,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 16:10:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-24 16:10:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 16:10:23,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:23,500 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:23,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:10:23,501 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-24 16:10:23,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:23,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573434854] [2020-09-24 16:10:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,612 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,612 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,612 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,613 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 16:10:23,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-24 16:10:23,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:10:23,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:23,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 16:10:23,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:23,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:23,797 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:23,797 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:23,797 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:23,797 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:23,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:23,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:23,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:23,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:23,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:23,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:23,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:23,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573434854] [2020-09-24 16:10:23,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:23,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 16:10:23,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822585524] [2020-09-24 16:10:23,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 16:10:23,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:23,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 16:10:23,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:10:23,807 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-24 16:10:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:24,131 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-24 16:10:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 16:10:24,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-24 16:10:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:24,133 INFO L225 Difference]: With dead ends: 84 [2020-09-24 16:10:24,133 INFO L226 Difference]: Without dead ends: 73 [2020-09-24 16:10:24,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:10:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-24 16:10:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-24 16:10:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 16:10:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-24 16:10:24,141 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-24 16:10:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:24,141 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-24 16:10:24,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 16:10:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-24 16:10:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 16:10:24,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:24,143 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:24,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:10:24,143 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:24,146 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-24 16:10:24,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:24,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416951735] [2020-09-24 16:10:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:24,248 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:24,249 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:24,249 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:24,249 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:24,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 16:10:24,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-24 16:10:24,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:10:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 16:10:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 16:10:24,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:24,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:24,474 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:24,475 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:24,475 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:24,475 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:24,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:24,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:24,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:24,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:24,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:24,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:24,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:24,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416951735] [2020-09-24 16:10:24,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:24,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 16:10:24,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204623251] [2020-09-24 16:10:24,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 16:10:24,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 16:10:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:10:24,488 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-24 16:10:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:24,836 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-24 16:10:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 16:10:24,837 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-24 16:10:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:24,838 INFO L225 Difference]: With dead ends: 89 [2020-09-24 16:10:24,838 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 16:10:24,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:10:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 16:10:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-24 16:10:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 16:10:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-24 16:10:24,853 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-24 16:10:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:24,854 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-24 16:10:24,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 16:10:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-24 16:10:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 16:10:24,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:24,858 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:24,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:10:24,858 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-24 16:10:24,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:24,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707069101] [2020-09-24 16:10:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 16:10:24,882 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 16:10:24,882 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 16:10:24,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:10:24,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:10:24 BoogieIcfgContainer [2020-09-24 16:10:24,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 16:10:24,925 INFO L168 Benchmark]: Toolchain (without parser) took 6325.00 ms. Allocated memory was 141.0 MB in the beginning and 274.2 MB in the end (delta: 133.2 MB). Free memory was 104.0 MB in the beginning and 219.7 MB in the end (delta: -115.8 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,926 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 16:10:24,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.60 ms. Allocated memory is still 141.0 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,929 INFO L168 Benchmark]: Boogie Preprocessor took 125.98 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.9 MB in the beginning and 184.5 MB in the end (delta: -90.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,930 INFO L168 Benchmark]: RCFGBuilder took 300.93 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,939 INFO L168 Benchmark]: TraceAbstraction took 5567.65 ms. Allocated memory was 204.5 MB in the beginning and 274.2 MB in the end (delta: 69.7 MB). Free memory was 171.3 MB in the beginning and 219.7 MB in the end (delta: -48.5 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-09-24 16:10:24,945 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.60 ms. Allocated memory is still 141.0 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.98 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.9 MB in the beginning and 184.5 MB in the end (delta: -90.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.93 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5567.65 ms. Allocated memory was 204.5 MB in the beginning and 274.2 MB in the end (delta: 69.7 MB). Free memory was 171.3 MB in the beginning and 219.7 MB in the end (delta: -48.5 MB). Peak memory consumption was 21.3 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, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 185 SDslu, 1037 SDs, 0 SdLazy, 673 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 32 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 515 NumberOfCodeBlocks, 515 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 430 ConstructedInterpolants, 0 QuantifiedInterpolants, 50931 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 152/737 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...