/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:58:34,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:58:34,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:58:34,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:58:34,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:58:34,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:58:34,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:58:34,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:58:34,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:58:34,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:58:34,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:58:34,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:58:34,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:58:34,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:58:34,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:58:34,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:58:35,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:58:35,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:58:35,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:58:35,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:58:35,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:58:35,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:58:35,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:58:35,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:58:35,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:58:35,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:58:35,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:58:35,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:58:35,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:58:35,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:58:35,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:58:35,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:58:35,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:58:35,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:58:35,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:58:35,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:58:35,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:58:35,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:58:35,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:58:35,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:58:35,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:58:35,068 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 [2020-10-27 01:58:35,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:58:35,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:58:35,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:58:35,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:58:35,118 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:58:35,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:58:35,118 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:58:35,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:58:35,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:58:35,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:58:35,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:58:35,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:58:35,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:58:35,120 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:58:35,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:58:35,121 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:58:35,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:58:35,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:58:35,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:58:35,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:58:35,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:58:35,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:58:35,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:58:35,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:58:35,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:58:35,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:58:35,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:58:35,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:58:35,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:58:35,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:58:35,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:58:35,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:58:35,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:58:35,586 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:58:35,587 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:58:35,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-10-27 01:58:35,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f896712f6/a1b5509a011c457da0af6c1975f95244/FLAG9ac7c575d [2020-10-27 01:58:36,266 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:58:36,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-10-27 01:58:36,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f896712f6/a1b5509a011c457da0af6c1975f95244/FLAG9ac7c575d [2020-10-27 01:58:36,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f896712f6/a1b5509a011c457da0af6c1975f95244 [2020-10-27 01:58:36,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:58:36,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:58:36,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:36,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:58:36,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:58:36,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:36,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cbadeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36, skipping insertion in model container [2020-10-27 01:58:36,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:36,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:58:36,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:58:36,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:36,935 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:58:36,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:58:36,974 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:58:36,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36 WrapperNode [2020-10-27 01:58:36,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:58:36,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:58:36,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:58:36,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:58:36,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:36,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:36,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:36,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:37,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:37,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:37,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (1/1) ... [2020-10-27 01:58:37,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:58:37,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:58:37,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:58:37,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:58:37,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (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 [2020-10-27 01:58:37,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:58:37,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:58:37,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:58:37,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:58:37,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:58:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:58:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:58:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:58:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:58:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:58:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:58:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:58:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 01:58:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:58:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:58:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:58:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:58:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:58:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:58:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:58:37,425 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:58:37,425 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:58:37,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:37 BoogieIcfgContainer [2020-10-27 01:58:37,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:58:37,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:58:37,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:58:37,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:58:37,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:58:36" (1/3) ... [2020-10-27 01:58:37,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25418029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:37, skipping insertion in model container [2020-10-27 01:58:37,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:58:36" (2/3) ... [2020-10-27 01:58:37,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25418029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:58:37, skipping insertion in model container [2020-10-27 01:58:37,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:58:37" (3/3) ... [2020-10-27 01:58:37,443 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-10-27 01:58:37,463 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:58:37,470 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:58:37,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:58:37,567 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:58:37,570 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:58:37,570 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:58:37,571 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:58:37,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:58:37,571 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:58:37,571 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:58:37,571 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:58:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:58:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:58:37,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:37,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:37,644 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-10-27 01:58:37,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:37,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697693656] [2020-10-27 01:58:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:37,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:38,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:58:38,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:58:38,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-27 01:58:38,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:38,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:58:38,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:38,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:58:38,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:58:38,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:38,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:38,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:38,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:38,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:58:38,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:38,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:38,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:38,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:38,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:38,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697693656] [2020-10-27 01:58:38,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:58:38,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:58:38,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581359966] [2020-10-27 01:58:38,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:58:38,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:38,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:58:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:38,535 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-27 01:58:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:39,010 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-10-27 01:58:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:58:39,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-27 01:58:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:39,021 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:58:39,021 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:58:39,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:58:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:58:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:58:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:58:39,118 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-10-27 01:58:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:39,118 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:58:39,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:58:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:58:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:58:39,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:39,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:39,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:58:39,120 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-10-27 01:58:39,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:39,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340543398] [2020-10-27 01:58:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:39,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:39,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:58:39,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-27 01:58:39,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:39,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:58:39,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:39,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:58:39,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:39,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:39,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:39,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:39,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:39,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:58:39,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:39,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:39,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:39,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:39,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:39,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340543398] [2020-10-27 01:58:39,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:39,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:58:39,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155474184] [2020-10-27 01:58:39,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:58:39,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:39,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:58:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:39,850 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 10 states. [2020-10-27 01:58:40,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:40,436 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-27 01:58:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:58:40,437 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-27 01:58:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:40,439 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:58:40,440 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:58:40,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:58:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:58:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 01:58:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:58:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 01:58:40,451 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-27 01:58:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:40,451 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 01:58:40,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:58:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 01:58:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:58:40,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:40,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:40,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:58:40,453 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1260847419, now seen corresponding path program 2 times [2020-10-27 01:58:40,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:40,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461658465] [2020-10-27 01:58:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:40,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:58:40,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:40,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 01:58:40,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:58:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:58:40,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:41,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:41,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:41,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:41,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:41,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:58:41,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:41,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:41,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:41,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:58:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:58:41,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461658465] [2020-10-27 01:58:41,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:41,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:58:41,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327622972] [2020-10-27 01:58:41,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:58:41,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:41,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:58:41,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:41,022 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2020-10-27 01:58:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:41,705 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-27 01:58:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:58:41,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-27 01:58:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:41,707 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:58:41,708 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:58:41,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:58:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:58:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-27 01:58:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:58:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-27 01:58:41,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2020-10-27 01:58:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:41,716 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-27 01:58:41,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:58:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-27 01:58:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:58:41,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:41,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:41,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:58:41,718 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:41,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1940905789, now seen corresponding path program 1 times [2020-10-27 01:58:41,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:41,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092685403] [2020-10-27 01:58:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:41,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:41,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:58:41,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:41,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 01:58:41,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:58:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:58:41,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:41,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:41,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:41,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:41,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:41,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:41,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:41,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:41,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:41,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:41,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092685403] [2020-10-27 01:58:41,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:41,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:58:41,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175032964] [2020-10-27 01:58:41,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:58:41,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:58:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:58:41,845 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-10-27 01:58:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:41,967 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-27 01:58:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:58:41,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 01:58:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:41,969 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:58:41,969 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:58:41,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:58:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:58:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 01:58:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:58:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 01:58:41,977 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-10-27 01:58:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:41,978 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 01:58:41,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:58:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 01:58:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:58:41,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:41,979 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:41,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:58:41,987 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:41,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1381757816, now seen corresponding path program 2 times [2020-10-27 01:58:41,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:41,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633384735] [2020-10-27 01:58:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:58:42,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:42,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 01:58:42,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:58:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:42,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:58:42,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:42,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:42,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:42,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:42,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:42,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:42,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:42,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633384735] [2020-10-27 01:58:42,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:42,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:58:42,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877347119] [2020-10-27 01:58:42,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:58:42,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:58:42,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:58:42,181 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-27 01:58:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:42,328 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-27 01:58:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:58:42,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 01:58:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:42,330 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:58:42,330 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:58:42,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:58:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:58:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 01:58:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:58:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 01:58:42,338 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-27 01:58:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:42,338 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 01:58:42,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:58:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 01:58:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:58:42,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:42,340 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:42,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:58:42,340 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash -312331939, now seen corresponding path program 3 times [2020-10-27 01:58:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:42,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344733053] [2020-10-27 01:58:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:42,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:58:42,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:42,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 01:58:42,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:58:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:42,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:58:42,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:42,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:42,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:42,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:58:42,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:42,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:42,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:42,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:42,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344733053] [2020-10-27 01:58:42,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:42,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:58:42,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316336739] [2020-10-27 01:58:42,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:58:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:58:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:58:42,534 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-10-27 01:58:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:42,741 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-27 01:58:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:58:42,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 01:58:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:42,745 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:58:42,745 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:58:42,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:42,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:58:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 01:58:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:58:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-27 01:58:42,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-27 01:58:42,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:42,754 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-27 01:58:42,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:58:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-27 01:58:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:58:42,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:42,756 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:42,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:58:42,756 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:42,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:42,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1220472152, now seen corresponding path program 4 times [2020-10-27 01:58:42,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:42,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92229380] [2020-10-27 01:58:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:42,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:58:42,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 01:58:42,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:58:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:58:42,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:42,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:42,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:42,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:42,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:42,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:58:42,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:42,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:42,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92229380] [2020-10-27 01:58:42,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:42,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:58:42,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974750323] [2020-10-27 01:58:42,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:58:42,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:58:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:58:42,988 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-27 01:58:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:43,246 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-27 01:58:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:58:43,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-27 01:58:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:43,248 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:58:43,248 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:58:43,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:58:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:58:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 01:58:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:58:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 01:58:43,258 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-10-27 01:58:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:43,258 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 01:58:43,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:58:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 01:58:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:58:43,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:43,260 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:43,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:58:43,260 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:43,260 INFO L82 PathProgramCache]: Analyzing trace with hash 894856061, now seen corresponding path program 5 times [2020-10-27 01:58:43,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:43,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266960183] [2020-10-27 01:58:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:43,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:43,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:43,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:58:43,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:43,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 01:58:43,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:43,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:58:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:43,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:58:43,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:43,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:43,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:43,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:43,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:43,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:43,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:43,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:43,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:43,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266960183] [2020-10-27 01:58:43,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:43,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:58:43,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619483828] [2020-10-27 01:58:43,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:58:43,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:58:43,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:58:43,480 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-10-27 01:58:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:43,800 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-27 01:58:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:58:43,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 01:58:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:43,802 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:58:43,802 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:58:43,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:58:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:58:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 01:58:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:58:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-27 01:58:43,811 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-27 01:58:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:43,811 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-27 01:58:43,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:58:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-27 01:58:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:58:43,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:43,812 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:43,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:58:43,813 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1497956552, now seen corresponding path program 6 times [2020-10-27 01:58:43,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:43,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147306037] [2020-10-27 01:58:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:43,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:43,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:43,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:58:43,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 01:58:43,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:43,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:58:43,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:58:43,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:44,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:44,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:44,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:44,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:44,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:44,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:44,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:44,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147306037] [2020-10-27 01:58:44,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:44,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:58:44,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553042575] [2020-10-27 01:58:44,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:58:44,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:44,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:58:44,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:58:44,094 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-10-27 01:58:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:44,438 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-27 01:58:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:58:44,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-27 01:58:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:44,440 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:58:44,440 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:58:44,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:58:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:58:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 01:58:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:58:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 01:58:44,458 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-27 01:58:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:44,458 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 01:58:44,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:58:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 01:58:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:58:44,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:44,460 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:44,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:58:44,464 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:44,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2088668573, now seen corresponding path program 7 times [2020-10-27 01:58:44,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:44,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452715071] [2020-10-27 01:58:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:44,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:44,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:44,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:58:44,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:44,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 01:58:44,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:44,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:58:44,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:44,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:58:44,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:44,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:44,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:44,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:44,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:44,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:58:44,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:44,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:44,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:44,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:44,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452715071] [2020-10-27 01:58:44,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:44,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:58:44,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484206101] [2020-10-27 01:58:44,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:58:44,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:58:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:58:44,927 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-10-27 01:58:45,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:45,320 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-27 01:58:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:58:45,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-27 01:58:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:45,323 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:58:45,323 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:58:45,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:58:45,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:58:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 01:58:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:58:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-27 01:58:45,338 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-10-27 01:58:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:45,341 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-27 01:58:45,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:58:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-27 01:58:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:58:45,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:45,344 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:45,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:58:45,344 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1041377560, now seen corresponding path program 8 times [2020-10-27 01:58:45,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:45,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002032550] [2020-10-27 01:58:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:45,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:45,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:45,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:58:45,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:45,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 01:58:45,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:45,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:58:45,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:45,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:58:45,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:45,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:45,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:45,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:45,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:45,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:45,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:45,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:45,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:45,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:45,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:45,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:58:45,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002032550] [2020-10-27 01:58:45,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:45,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:58:45,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801647737] [2020-10-27 01:58:45,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:58:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:45,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:58:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:58:45,749 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2020-10-27 01:58:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:46,158 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-27 01:58:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:58:46,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 01:58:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:46,160 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:58:46,160 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:58:46,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:58:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:58:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 01:58:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:58:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 01:58:46,174 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2020-10-27 01:58:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:46,175 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 01:58:46,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:58:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 01:58:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:58:46,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:46,176 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:46,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:58:46,179 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash -162752579, now seen corresponding path program 9 times [2020-10-27 01:58:46,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:46,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461909573] [2020-10-27 01:58:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:58:46,219 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:58:46,219 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:58:46,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:58:46,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:58:46 BoogieIcfgContainer [2020-10-27 01:58:46,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:58:46,263 INFO L168 Benchmark]: Toolchain (without parser) took 9621.36 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 144.4 MB in the beginning and 135.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 85.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:46,263 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 168.8 MB. Free memory is still 141.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:58:46,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.19 ms. Allocated memory is still 168.8 MB. Free memory was 143.7 MB in the beginning and 134.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:46,265 INFO L168 Benchmark]: Boogie Preprocessor took 37.79 ms. Allocated memory is still 168.8 MB. Free memory was 134.0 MB in the beginning and 132.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:46,265 INFO L168 Benchmark]: RCFGBuilder took 413.78 ms. Allocated memory is still 168.8 MB. Free memory was 132.4 MB in the beginning and 119.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:46,266 INFO L168 Benchmark]: TraceAbstraction took 8828.39 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 119.2 MB in the beginning and 135.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 60.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:58:46,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 168.8 MB. Free memory is still 141.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 327.19 ms. Allocated memory is still 168.8 MB. Free memory was 143.7 MB in the beginning and 134.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.79 ms. Allocated memory is still 168.8 MB. Free memory was 134.0 MB in the beginning and 132.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 413.78 ms. Allocated memory is still 168.8 MB. Free memory was 132.4 MB in the beginning and 119.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8828.39 ms. Allocated memory was 168.8 MB in the beginning and 244.3 MB in the end (delta: 75.5 MB). Free memory was 119.2 MB in the beginning and 135.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 60.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND FALSE !(i<10) [L24] i++ [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.6s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 143 SDtfs, 283 SDslu, 344 SDs, 0 SdLazy, 667 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=11, 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, 11 MinimizatonAttempts, 15 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 327 NumberOfCodeBlocks, 327 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 273 ConstructedInterpolants, 0 QuantifiedInterpolants, 25485 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 81/410 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...