/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 04:06:34,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 04:06:34,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 04:06:34,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 04:06:34,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 04:06:34,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 04:06:34,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 04:06:34,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 04:06:34,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 04:06:34,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 04:06:34,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 04:06:34,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 04:06:34,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 04:06:34,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 04:06:34,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 04:06:34,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 04:06:34,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 04:06:34,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 04:06:34,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 04:06:34,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 04:06:34,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 04:06:34,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 04:06:34,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 04:06:34,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 04:06:34,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 04:06:34,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 04:06:34,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 04:06:34,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 04:06:34,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 04:06:34,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 04:06:34,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 04:06:34,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 04:06:34,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 04:06:34,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 04:06:34,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 04:06:34,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 04:06:34,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 04:06:34,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 04:06:34,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 04:06:34,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 04:06:34,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 04:06:34,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 04:06:34,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 04:06:34,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 04:06:34,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 04:06:34,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 04:06:34,275 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 04:06:34,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 04:06:34,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 04:06:34,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 04:06:34,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 04:06:34,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 04:06:34,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 04:06:34,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 04:06:34,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 04:06:34,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 04:06:34,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 04:06:34,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 04:06:34,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 04:06:34,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 04:06:34,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 04:06:34,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 04:06:34,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 04:06:34,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:06:34,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 04:06:34,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 04:06:34,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 04:06:34,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 04:06:34,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 04:06:34,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 04:06:34,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 04:06:34,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 04:06:34,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 04:06:34,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 04:06:34,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 04:06:34,677 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 04:06:34,678 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 04:06:34,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-10-27 04:06:34,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0451512d8/4469eb6cffa84eb4aec32bdd92e45cdc/FLAGdf40c19cf [2020-10-27 04:06:35,332 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 04:06:35,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-10-27 04:06:35,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0451512d8/4469eb6cffa84eb4aec32bdd92e45cdc/FLAGdf40c19cf [2020-10-27 04:06:35,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0451512d8/4469eb6cffa84eb4aec32bdd92e45cdc [2020-10-27 04:06:35,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 04:06:35,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 04:06:35,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 04:06:35,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 04:06:35,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 04:06:35,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:35,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60861300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35, skipping insertion in model container [2020-10-27 04:06:35,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:35,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 04:06:35,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 04:06:35,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:06:35,963 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 04:06:35,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:06:35,998 INFO L208 MainTranslator]: Completed translation [2020-10-27 04:06:35,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35 WrapperNode [2020-10-27 04:06:35,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 04:06:35,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 04:06:35,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 04:06:36,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 04:06:36,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:36,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:36,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:36,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:36,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:36,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:36,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (1/1) ... [2020-10-27 04:06:36,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 04:06:36,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 04:06:36,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 04:06:36,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 04:06:36,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:06:36,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 04:06:36,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 04:06:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 04:06:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-27 04:06:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-27 04:06:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 04:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-27 04:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 04:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 04:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 04:06:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 04:06:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-27 04:06:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-27 04:06:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 04:06:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 04:06:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 04:06:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 04:06:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 04:06:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 04:06:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 04:06:36,608 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 04:06:36,609 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 04:06:36,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:06:36 BoogieIcfgContainer [2020-10-27 04:06:36,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 04:06:36,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 04:06:36,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 04:06:36,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 04:06:36,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:06:35" (1/3) ... [2020-10-27 04:06:36,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587d8963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:06:36, skipping insertion in model container [2020-10-27 04:06:36,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:35" (2/3) ... [2020-10-27 04:06:36,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587d8963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:06:36, skipping insertion in model container [2020-10-27 04:06:36,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:06:36" (3/3) ... [2020-10-27 04:06:36,625 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-10-27 04:06:36,637 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 04:06:36,642 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 04:06:36,657 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 04:06:36,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 04:06:36,689 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 04:06:36,689 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 04:06:36,689 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 04:06:36,689 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 04:06:36,689 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 04:06:36,689 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 04:06:36,690 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 04:06:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 04:06:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 04:06:36,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:36,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:36,728 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:36,734 INFO L82 PathProgramCache]: Analyzing trace with hash 791772439, now seen corresponding path program 1 times [2020-10-27 04:06:36,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:36,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320515342] [2020-10-27 04:06:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:36,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:37,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:37,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:06:37,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:37,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-27 04:06:37,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:37,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:37,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 04:06:37,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:37,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 04:06:37,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:37,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:37,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:37,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:37,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:37,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 04:06:37,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:37,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:37,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:37,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:37,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:37,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:37,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:37,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 04:06:37,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:06:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:37,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:37,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:06:37,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320515342] [2020-10-27 04:06:37,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:37,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:06:37,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843141759] [2020-10-27 04:06:37,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:06:37,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:06:37,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:06:37,510 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-27 04:06:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:37,892 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-27 04:06:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:06:37,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 04:06:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:37,904 INFO L225 Difference]: With dead ends: 46 [2020-10-27 04:06:37,904 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 04:06:37,908 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 [2020-10-27 04:06:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 04:06:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 04:06:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 04:06:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 04:06:37,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-10-27 04:06:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:37,960 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 04:06:37,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:06:37,960 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 04:06:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 04:06:37,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:37,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:37,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 04:06:37,963 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2001775916, now seen corresponding path program 1 times [2020-10-27 04:06:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:37,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237640762] [2020-10-27 04:06:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:37,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:38,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:38,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 04:06:38,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:38,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-27 04:06:38,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:38,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:38,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 04:06:38,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:38,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:38,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:38,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:38,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:38,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:38,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:06:38,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:38,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:38,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:38,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:38,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:38,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 04:06:38,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:38,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 04:06:38,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-27 04:06:38,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:38,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:38,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:38,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:38,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:38,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:38,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:38,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:06:38,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:38,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:06:38,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:38,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:38,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:06:38,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237640762] [2020-10-27 04:06:38,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:38,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:06:38,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220758413] [2020-10-27 04:06:38,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:06:38,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:06:38,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:06:38,610 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-27 04:06:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:38,837 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-27 04:06:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:06:38,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 04:06:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:38,839 INFO L225 Difference]: With dead ends: 47 [2020-10-27 04:06:38,840 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 04:06:38,841 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 [2020-10-27 04:06:38,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 04:06:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-27 04:06:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 04:06:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 04:06:38,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-27 04:06:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:38,851 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 04:06:38,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:06:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 04:06:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 04:06:38,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:38,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:38,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 04:06:38,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:38,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1405687699, now seen corresponding path program 1 times [2020-10-27 04:06:38,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:38,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499969558] [2020-10-27 04:06:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:38,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:38,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:38,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 04:06:38,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:38,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 04:06:38,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:38,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:38,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 04:06:38,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 04:06:38,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:38,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:38,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:39,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:39,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:39,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:06:39,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:39,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:39,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:39,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:39,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:39,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:39,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:39,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 04:06:39,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:39,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 04:06:39,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:39,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:06:39,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:39,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 04:06:39,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:39,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:39,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:39,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:39,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:39,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:39,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 04:06:39,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:39,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:39,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:39,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:39,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:06:39,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499969558] [2020-10-27 04:06:39,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:39,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:06:39,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919006262] [2020-10-27 04:06:39,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:06:39,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:39,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:06:39,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:06:39,086 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-27 04:06:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:39,292 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-27 04:06:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:06:39,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 04:06:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:39,293 INFO L225 Difference]: With dead ends: 32 [2020-10-27 04:06:39,293 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 04:06:39,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:06:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 04:06:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 04:06:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 04:06:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 04:06:39,295 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-27 04:06:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:39,295 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 04:06:39,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:06:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 04:06:39,296 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 04:06:39,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 04:06:39,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 04:06:39,393 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-27 04:06:39,393 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-27 04:06:39,393 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-27 04:06:39,394 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-27 04:06:39,394 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 04:06:39,394 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|)) [2020-10-27 04:06:39,394 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 04:06:39,394 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-27 04:06:39,395 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-27 04:06:39,395 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-10-27 04:06:39,395 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-10-27 04:06:39,395 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-27 04:06:39,395 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-10-27 04:06:39,395 INFO L277 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-10-27 04:06:39,395 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 04:06:39,396 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 04:06:39,396 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 04:06:39,396 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 04:06:39,396 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 23 29) the Hoare annotation is: true [2020-10-27 04:06:39,396 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: false [2020-10-27 04:06:39,396 INFO L274 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-10-27 04:06:39,396 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-10-27 04:06:39,396 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-27 04:06:39,397 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 23 29) no Hoare annotation was computed. [2020-10-27 04:06:39,397 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-27 04:06:39,397 INFO L274 CegarLoopResult]: For program point L26-2(lines 23 29) no Hoare annotation was computed. [2020-10-27 04:06:39,397 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-10-27 04:06:39,397 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-27 04:06:39,397 INFO L277 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-10-27 04:06:39,397 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-10-27 04:06:39,397 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-10-27 04:06:39,398 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-10-27 04:06:39,398 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-10-27 04:06:39,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:06:39 BoogieIcfgContainer [2020-10-27 04:06:39,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 04:06:39,407 INFO L168 Benchmark]: Toolchain (without parser) took 3671.74 ms. Allocated memory was 160.4 MB in the beginning and 196.1 MB in the end (delta: 35.7 MB). Free memory was 135.9 MB in the beginning and 142.9 MB in the end (delta: -7.0 MB). Peak memory consumption was 29.6 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:39,408 INFO L168 Benchmark]: CDTParser took 0.63 ms. Allocated memory is still 160.4 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 04:06:39,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.23 ms. Allocated memory is still 160.4 MB. Free memory was 135.3 MB in the beginning and 126.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:39,410 INFO L168 Benchmark]: Boogie Preprocessor took 32.14 ms. Allocated memory is still 160.4 MB. Free memory was 126.0 MB in the beginning and 124.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:39,410 INFO L168 Benchmark]: RCFGBuilder took 579.07 ms. Allocated memory is still 160.4 MB. Free memory was 124.7 MB in the beginning and 110.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:39,411 INFO L168 Benchmark]: TraceAbstraction took 2788.18 ms. Allocated memory was 160.4 MB in the beginning and 196.1 MB in the end (delta: 35.7 MB). Free memory was 110.5 MB in the beginning and 142.9 MB in the end (delta: -32.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:39,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63 ms. Allocated memory is still 160.4 MB. Free memory is still 132.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.23 ms. Allocated memory is still 160.4 MB. Free memory was 135.3 MB in the beginning and 126.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.14 ms. Allocated memory is still 160.4 MB. Free memory was 126.0 MB in the beginning and 124.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 579.07 ms. Allocated memory is still 160.4 MB. Free memory was 124.7 MB in the beginning and 110.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2788.18 ms. Allocated memory was 160.4 MB in the beginning and 196.1 MB in the end (delta: 35.7 MB). Free memory was 110.5 MB in the beginning and 142.9 MB in the end (delta: -32.4 MB). Peak memory consumption was 4.4 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 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 62 SDslu, 82 SDs, 0 SdLazy, 217 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 11 LocationsWithAnnotation, 15 PreInvPairs, 15 NumberOfFragments, 41 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 180 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 4494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...