/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:46:05,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:46:05,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:46:05,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:46:05,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:46:05,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:46:05,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:46:05,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:46:05,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:46:05,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:46:05,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:46:05,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:46:05,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:46:05,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:46:05,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:46:05,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:46:05,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:46:05,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:46:05,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:46:05,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:46:05,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:46:05,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:46:05,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:46:05,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:46:05,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:46:05,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:46:05,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:46:05,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:46:05,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:46:05,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:46:05,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:46:05,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:46:05,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:46:05,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:46:05,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:46:05,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:46:05,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:46:05,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:46:05,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:46:05,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:46:05,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:46:05,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 07:46:06,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:46:06,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:46:06,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:46:06,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:46:06,042 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:46:06,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:46:06,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:46:06,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:46:06,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:46:06,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:46:06,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:46:06,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:46:06,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:46:06,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:46:06,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:46:06,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:46:06,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:46:06,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:46:06,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:46:06,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:46:06,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:46:06,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:46:06,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:46:06,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:46:06,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:46:06,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:46:06,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:46:06,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:46:06,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:46:06,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:46:06,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:46:06,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:46:06,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:46:06,545 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:46:06,546 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:46:06,547 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-09-25 07:46:06,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c327d08ad/d6458be962554c3da5e0a9d94225f7e3/FLAGfc8f54f91 [2020-09-25 07:46:07,157 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:46:07,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-09-25 07:46:07,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c327d08ad/d6458be962554c3da5e0a9d94225f7e3/FLAGfc8f54f91 [2020-09-25 07:46:07,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c327d08ad/d6458be962554c3da5e0a9d94225f7e3 [2020-09-25 07:46:07,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:46:07,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:46:07,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:46:07,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:46:07,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:46:07,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d786d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07, skipping insertion in model container [2020-09-25 07:46:07,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:46:07,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:46:07,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:46:07,788 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:46:07,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:46:07,821 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:46:07,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07 WrapperNode [2020-09-25 07:46:07,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:46:07,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:46:07,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:46:07,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:46:07,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (1/1) ... [2020-09-25 07:46:07,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:46:07,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:46:07,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:46:07,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:46:07,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:46:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:46:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:46:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 07:46:08,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:46:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:46:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:46:08,021 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 07:46:08,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:46:08,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:46:08,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:46:08,256 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:46:08,257 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 07:46:08,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:46:08 BoogieIcfgContainer [2020-09-25 07:46:08,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:46:08,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:46:08,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:46:08,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:46:08,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:46:07" (1/3) ... [2020-09-25 07:46:08,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207a1bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:46:08, skipping insertion in model container [2020-09-25 07:46:08,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:46:07" (2/3) ... [2020-09-25 07:46:08,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207a1bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:46:08, skipping insertion in model container [2020-09-25 07:46:08,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:46:08" (3/3) ... [2020-09-25 07:46:08,270 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-09-25 07:46:08,280 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:46:08,291 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:46:08,311 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:46:08,339 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:46:08,340 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:46:08,340 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:46:08,340 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:46:08,340 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:46:08,340 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:46:08,341 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:46:08,341 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:46:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 07:46:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 07:46:08,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:46:08,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:46:08,372 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:46:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:46:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times [2020-09-25 07:46:08,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:46:08,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463752503] [2020-09-25 07:46:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:46:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:08,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:08,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:08,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 07:46:08,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:08,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 07:46:08,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:08,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:08,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:46:08,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:46:08,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 07:46:08,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 07:46:08,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:46:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:08,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:08,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:08,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 07:46:08,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:08,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 07:46:08,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:08,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:08,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:46:08,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:46:08,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:46:08,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:46:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 07:46:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:08,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:08,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:08,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:46:08,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:08,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 07:46:08,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:08,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:08,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:46:08,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:46:08,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:46:08,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:46:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:46:08,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463752503] [2020-09-25 07:46:08,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:46:08,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 07:46:08,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091324762] [2020-09-25 07:46:08,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:46:08,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:46:08,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:46:08,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:46:08,739 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-25 07:46:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:46:08,850 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-09-25 07:46:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:46:08,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 07:46:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:46:08,867 INFO L225 Difference]: With dead ends: 44 [2020-09-25 07:46:08,867 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 07:46:08,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:46:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 07:46:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 07:46:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 07:46:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 07:46:08,926 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-09-25 07:46:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:46:08,926 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 07:46:08,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:46:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 07:46:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 07:46:08,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:46:08,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:46:08,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:46:08,930 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:46:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:46:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times [2020-09-25 07:46:08,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:46:08,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190312479] [2020-09-25 07:46:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:46:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:08,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:09,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:09,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:09,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 07:46:09,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:46:09,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-09-25 07:46:09,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:09,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:09,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:46:09,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 07:46:09,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 07:46:09,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 07:46:09,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:46:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:09,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:09,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:09,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 07:46:09,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:09,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 07:46:09,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:09,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:09,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:46:09,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:46:09,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:46:09,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 07:46:09,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 07:46:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:09,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:09,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:09,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:09,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 07:46:09,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:46:09,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-09-25 07:46:09,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:09,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:46:09,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:46:09,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 07:46:09,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:46:09,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 07:46:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:09,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:09,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:46:09,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:09,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 07:46:09,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:09,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:09,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:46:09,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:46:09,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:46:09,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:46:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:46:09,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190312479] [2020-09-25 07:46:09,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:46:09,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 07:46:09,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311662073] [2020-09-25 07:46:09,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:46:09,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:46:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:46:09,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:46:09,927 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-09-25 07:46:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:46:10,002 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-09-25 07:46:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:46:10,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-09-25 07:46:10,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:46:10,005 INFO L225 Difference]: With dead ends: 36 [2020-09-25 07:46:10,005 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 07:46:10,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:46:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 07:46:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-25 07:46:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 07:46:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 07:46:10,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 28 [2020-09-25 07:46:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:46:10,014 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 07:46:10,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:46:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 07:46:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 07:46:10,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:46:10,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:46:10,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:46:10,016 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:46:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:46:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times [2020-09-25 07:46:10,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:46:10,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272291381] [2020-09-25 07:46:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:46:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:10,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:10,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:10,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 07:46:10,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:10,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-25 07:46:10,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:10,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:10,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 07:46:10,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 07:46:10,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 07:46:10,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:46:10,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:46:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:10,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:10,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 07:46:10,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:10,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 07:46:10,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:10,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:10,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:46:10,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:46:10,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:46:10,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:46:10,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 07:46:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:10,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:10,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:10,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 07:46:10,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:10,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 07:46:10,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:10,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:46:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:46:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 07:46:10,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:46:10,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 07:46:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:46:10,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:46:10,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:46:10,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:46:10,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:46:10,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 07:46:10,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:46:10,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:46:10,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:46:10,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:46:10,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 07:46:10,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:46:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:46:10,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272291381] [2020-09-25 07:46:10,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:46:10,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 07:46:10,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384904747] [2020-09-25 07:46:10,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 07:46:10,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:46:10,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 07:46:10,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 07:46:10,354 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-09-25 07:46:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:46:10,455 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-09-25 07:46:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 07:46:10,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-25 07:46:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:46:10,457 INFO L225 Difference]: With dead ends: 57 [2020-09-25 07:46:10,457 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 07:46:10,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 07:46:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 07:46:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-09-25 07:46:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 07:46:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-25 07:46:10,465 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-09-25 07:46:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:46:10,466 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-25 07:46:10,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 07:46:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-25 07:46:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 07:46:10,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:46:10,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:46:10,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:46:10,468 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:46:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:46:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times [2020-09-25 07:46:10,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:46:10,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029067750] [2020-09-25 07:46:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:46:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 07:46:10,486 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 07:46:10,487 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 07:46:10,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:46:10,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 07:46:10 BoogieIcfgContainer [2020-09-25 07:46:10,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 07:46:10,519 INFO L168 Benchmark]: Toolchain (without parser) took 2997.82 ms. Allocated memory was 146.8 MB in the beginning and 235.4 MB in the end (delta: 88.6 MB). Free memory was 102.9 MB in the beginning and 151.6 MB in the end (delta: -48.7 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. [2020-09-25 07:46:10,520 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 07:46:10,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.75 ms. Allocated memory is still 146.8 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 07:46:10,521 INFO L168 Benchmark]: Boogie Preprocessor took 30.58 ms. Allocated memory is still 146.8 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-25 07:46:10,522 INFO L168 Benchmark]: RCFGBuilder took 407.54 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 91.3 MB in the beginning and 170.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-25 07:46:10,524 INFO L168 Benchmark]: TraceAbstraction took 2252.76 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 169.4 MB in the beginning and 151.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 50.3 MB. Max. memory is 7.1 GB. [2020-09-25 07:46:10,527 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.75 ms. Allocated memory is still 146.8 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.58 ms. Allocated memory is still 146.8 MB. Free memory was 92.6 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.54 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 91.3 MB in the beginning and 170.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2252.76 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 169.4 MB in the beginning and 151.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 50.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id((unsigned int)x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id((unsigned int)x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id((unsigned int)x-1) [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; [L6] RET, EXPR id((unsigned int)x-1) [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 2 [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 8 SDslu, 271 SDs, 0 SdLazy, 71 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 2977 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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...