/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 12:09:49,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 12:09:49,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 12:09:50,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 12:09:50,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 12:09:50,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 12:09:50,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 12:09:50,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 12:09:50,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 12:09:50,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 12:09:50,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 12:09:50,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 12:09:50,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 12:09:50,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 12:09:50,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 12:09:50,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 12:09:50,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 12:09:50,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 12:09:50,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 12:09:50,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 12:09:50,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 12:09:50,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 12:09:50,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 12:09:50,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 12:09:50,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 12:09:50,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 12:09:50,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 12:09:50,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 12:09:50,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 12:09:50,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 12:09:50,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 12:09:50,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 12:09:50,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 12:09:50,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 12:09:50,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 12:09:50,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 12:09:50,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 12:09:50,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 12:09:50,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 12:09:50,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 12:09:50,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 12:09:50,065 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 [2020-10-29 12:09:50,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 12:09:50,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 12:09:50,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 12:09:50,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 12:09:50,120 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 12:09:50,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 12:09:50,121 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 12:09:50,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 12:09:50,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 12:09:50,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 12:09:50,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 12:09:50,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 12:09:50,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 12:09:50,124 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 12:09:50,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 12:09:50,124 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 12:09:50,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 12:09:50,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 12:09:50,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 12:09:50,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 12:09:50,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 12:09:50,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 12:09:50,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 12:09:50,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 12:09:50,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 12:09:50,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 12:09:50,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 12:09:50,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 12:09:50,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 12:09:50,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 12:09:50,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 12:09:50,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 12:09:50,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 12:09:50,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 12:09:50,538 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 12:09:50,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-29 12:09:50,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/611bff28a/67fbdfe200df40e39593bd8ad5f2b154/FLAG9a48a0541 [2020-10-29 12:09:51,227 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 12:09:51,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-29 12:09:51,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/611bff28a/67fbdfe200df40e39593bd8ad5f2b154/FLAG9a48a0541 [2020-10-29 12:09:51,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/611bff28a/67fbdfe200df40e39593bd8ad5f2b154 [2020-10-29 12:09:51,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 12:09:51,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 12:09:51,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 12:09:51,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 12:09:51,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 12:09:51,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6f9e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51, skipping insertion in model container [2020-10-29 12:09:51,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 12:09:51,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 12:09:51,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:09:51,848 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 12:09:51,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 12:09:51,884 INFO L208 MainTranslator]: Completed translation [2020-10-29 12:09:51,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51 WrapperNode [2020-10-29 12:09:51,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 12:09:51,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 12:09:51,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 12:09:51,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 12:09:51,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (1/1) ... [2020-10-29 12:09:51,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 12:09:51,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 12:09:51,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 12:09:51,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 12:09:51,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (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 [2020-10-29 12:09:52,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 12:09:52,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 12:09:52,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 12:09:52,010 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-29 12:09:52,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 12:09:52,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 12:09:52,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 12:09:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 12:09:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 12:09:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 12:09:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-29 12:09:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 12:09:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 12:09:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 12:09:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 12:09:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 12:09:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 12:09:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 12:09:52,283 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 12:09:52,284 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 12:09:52,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:09:52 BoogieIcfgContainer [2020-10-29 12:09:52,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 12:09:52,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 12:09:52,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 12:09:52,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 12:09:52,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 12:09:51" (1/3) ... [2020-10-29 12:09:52,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16899ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:09:52, skipping insertion in model container [2020-10-29 12:09:52,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:09:51" (2/3) ... [2020-10-29 12:09:52,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16899ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 12:09:52, skipping insertion in model container [2020-10-29 12:09:52,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:09:52" (3/3) ... [2020-10-29 12:09:52,306 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-10-29 12:09:52,337 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 12:09:52,351 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 12:09:52,381 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 12:09:52,443 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 12:09:52,443 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 12:09:52,443 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 12:09:52,443 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 12:09:52,443 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 12:09:52,444 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 12:09:52,444 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 12:09:52,444 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 12:09:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-29 12:09:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 12:09:52,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:09:52,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 12:09:52,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:09:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:09:52,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1397195593, now seen corresponding path program 1 times [2020-10-29 12:09:52,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:09:52,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012704050] [2020-10-29 12:09:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:09:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:52,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:52,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 12:09:52,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:52,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-29 12:09:52,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:52,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:09:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 12:09:52,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:52,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 12:09:53,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:09:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:53,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:53,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:53,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:09:53,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:53,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 12:09:53,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:53,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:09:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:09:53,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:53,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:09:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:53,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:53,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:09:53,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:53,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 12:09:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:53,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:09:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:53,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 12:09:53,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012704050] [2020-10-29 12:09:53,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:09:53,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:09:53,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343514603] [2020-10-29 12:09:53,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:09:53,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:09:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:09:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:09:53,253 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-29 12:09:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:09:53,528 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-29 12:09:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:09:53,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 12:09:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:09:53,540 INFO L225 Difference]: With dead ends: 39 [2020-10-29 12:09:53,540 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 12:09:53,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 12:09:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 12:09:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 12:09:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 12:09:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-29 12:09:53,594 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-29 12:09:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:09:53,594 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-29 12:09:53,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:09:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-29 12:09:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 12:09:53,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:09:53,597 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] [2020-10-29 12:09:53,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 12:09:53,598 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:09:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:09:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash -630540429, now seen corresponding path program 1 times [2020-10-29 12:09:53,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:09:53,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594341532] [2020-10-29 12:09:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:09:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:53,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:53,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:54,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:54,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 12:09:54,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 12:09:54,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-29 12:09:54,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:54,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:09:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 12:09:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:54,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 12:09:54,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:09:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:54,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:54,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:09:54,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:54,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 12:09:54,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:54,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:54,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:09:54,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:54,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:09:54,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:09:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:54,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:54,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:54,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 12:09:54,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:54,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-29 12:09:54,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:54,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:09:54,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-29 12:09:54,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:54,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-29 12:09:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:54,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:54,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:54,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:09:54,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:54,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 12:09:54,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:54,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:09:54,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:54,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:54,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 12:09:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 12:09:54,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594341532] [2020-10-29 12:09:54,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:09:54,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:09:54,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13237072] [2020-10-29 12:09:54,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:09:54,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:09:54,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:09:54,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:09:54,486 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-29 12:09:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:09:54,723 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-29 12:09:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:09:54,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-29 12:09:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:09:54,726 INFO L225 Difference]: With dead ends: 34 [2020-10-29 12:09:54,726 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 12:09:54,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 12:09:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 12:09:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-29 12:09:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 12:09:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-29 12:09:54,740 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2020-10-29 12:09:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:09:54,741 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-29 12:09:54,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:09:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-29 12:09:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 12:09:54,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 12:09:54,742 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] [2020-10-29 12:09:54,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 12:09:54,743 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 12:09:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 12:09:54,743 INFO L82 PathProgramCache]: Analyzing trace with hash 256963252, now seen corresponding path program 1 times [2020-10-29 12:09:54,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 12:09:54,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731905858] [2020-10-29 12:09:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 12:09:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:54,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:54,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:54,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 12:09:54,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:54,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-29 12:09:54,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:54,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 12:09:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 12:09:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 12:09:54,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:54,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 12:09:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:54,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:54,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:54,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 12:09:54,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:54,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 12:09:54,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:54,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:09:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:54,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:09:54,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:54,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 12:09:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:54,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:54,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:54,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-29 12:09:54,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:54,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 12:09:54,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:54,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 12:09:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 12:09:54,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 12:09:54,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-29 12:09:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 12:09:54,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 12:09:54,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 12:09:54,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 12:09:54,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 12:09:54,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 12:09:54,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 12:09:54,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 12:09:54,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 12:09:54,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 12:09:54,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 12:09:54,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 12:09:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 12:09:54,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731905858] [2020-10-29 12:09:54,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 12:09:54,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 12:09:54,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895272107] [2020-10-29 12:09:54,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 12:09:54,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 12:09:54,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 12:09:54,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 12:09:54,951 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-29 12:09:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 12:09:55,103 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-29 12:09:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 12:09:55,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-29 12:09:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 12:09:55,104 INFO L225 Difference]: With dead ends: 23 [2020-10-29 12:09:55,105 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 12:09:55,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-29 12:09:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 12:09:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 12:09:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 12:09:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 12:09:55,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-29 12:09:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 12:09:55,107 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 12:09:55,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 12:09:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 12:09:55,107 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 12:09:55,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 12:09:55,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 12:09:55,217 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-29 12:09:55,217 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-29 12:09:55,217 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-29 12:09:55,217 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-29 12:09:55,217 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 12:09:55,218 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-29 12:09:55,218 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 12:09:55,218 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 12:09:55,218 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 12:09:55,218 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 12:09:55,218 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 12:09:55,219 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-10-29 12:09:55,219 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 19) no Hoare annotation was computed. [2020-10-29 12:09:55,219 INFO L270 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-10-29 12:09:55,219 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-10-29 12:09:55,219 INFO L274 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-10-29 12:09:55,219 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-10-29 12:09:55,219 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-29 12:09:55,220 INFO L274 CegarLoopResult]: For program point L16-2(lines 13 19) no Hoare annotation was computed. [2020-10-29 12:09:55,220 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2020-10-29 12:09:55,220 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-29 12:09:55,220 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-29 12:09:55,220 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-10-29 12:09:55,220 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-10-29 12:09:55,220 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-29 12:09:55,220 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-29 12:09:55,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 12:09:55 BoogieIcfgContainer [2020-10-29 12:09:55,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 12:09:55,236 INFO L168 Benchmark]: Toolchain (without parser) took 3602.58 ms. Allocated memory was 167.8 MB in the beginning and 208.7 MB in the end (delta: 40.9 MB). Free memory was 142.5 MB in the beginning and 184.5 MB in the end (delta: -42.0 MB). Peak memory consumption was 113.3 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:55,236 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 167.8 MB. Free memory is still 141.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 12:09:55,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.06 ms. Allocated memory is still 167.8 MB. Free memory was 141.9 MB in the beginning and 132.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:55,238 INFO L168 Benchmark]: Boogie Preprocessor took 35.66 ms. Allocated memory is still 167.8 MB. Free memory was 132.9 MB in the beginning and 131.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:55,239 INFO L168 Benchmark]: RCFGBuilder took 363.25 ms. Allocated memory is still 167.8 MB. Free memory was 131.6 MB in the beginning and 119.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:55,240 INFO L168 Benchmark]: TraceAbstraction took 2937.82 ms. Allocated memory was 167.8 MB in the beginning and 208.7 MB in the end (delta: 40.9 MB). Free memory was 118.7 MB in the beginning and 184.5 MB in the end (delta: -65.9 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. [2020-10-29 12:09:55,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 167.8 MB. Free memory is still 141.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.06 ms. Allocated memory is still 167.8 MB. Free memory was 141.9 MB in the beginning and 132.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.66 ms. Allocated memory is still 167.8 MB. Free memory was 132.9 MB in the beginning and 131.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 363.25 ms. Allocated memory is still 167.8 MB. Free memory was 131.6 MB in the beginning and 119.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2937.82 ms. Allocated memory was 167.8 MB in the beginning and 208.7 MB in the end (delta: 40.9 MB). Free memory was 118.7 MB in the beginning and 184.5 MB in the end (delta: -65.9 MB). Peak memory consumption was 89.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 42 SDslu, 73 SDs, 0 SdLazy, 140 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 13 PreInvPairs, 13 NumberOfFragments, 39 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 120 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 4494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 8/8 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 correct! Received shutdown request...