/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:23:20,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:23:20,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:23:20,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:23:20,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:23:20,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:23:20,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:23:20,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:23:20,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:23:20,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:23:20,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:23:20,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:23:20,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:23:20,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:23:20,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:23:20,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:23:20,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:23:20,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:23:20,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:23:20,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:23:20,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:23:20,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:23:20,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:23:20,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:23:20,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:23:20,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:23:20,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:23:20,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:23:20,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:23:20,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:23:20,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:23:20,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:23:20,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:23:20,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:23:20,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:23:20,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:23:20,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:23:20,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:23:20,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:23:20,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:23:20,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:23:20,203 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 [2020-10-28 17:23:20,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:23:20,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:23:20,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:23:20,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:23:20,240 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:23:20,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:23:20,241 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:23:20,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:23:20,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:23:20,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:23:20,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:23:20,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:23:20,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:23:20,242 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:23:20,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:23:20,243 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:23:20,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:23:20,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:23:20,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:23:20,244 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:23:20,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:23:20,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:23:20,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:23:20,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:23:20,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:23:20,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:23:20,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:23:20,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:23:20,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:23:20,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:23:20,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:23:20,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:23:20,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:23:20,681 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:23:20,682 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:23:20,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-10-28 17:23:20,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d5bb4a14/29f8e6af340f497db42f3eabf2d15a8a/FLAG178b619f8 [2020-10-28 17:23:21,425 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:23:21,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-10-28 17:23:21,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d5bb4a14/29f8e6af340f497db42f3eabf2d15a8a/FLAG178b619f8 [2020-10-28 17:23:21,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d5bb4a14/29f8e6af340f497db42f3eabf2d15a8a [2020-10-28 17:23:21,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:23:21,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:23:21,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:23:21,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:23:21,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:23:21,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:23:21" (1/1) ... [2020-10-28 17:23:21,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f690327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:21, skipping insertion in model container [2020-10-28 17:23:21,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:23:21" (1/1) ... [2020-10-28 17:23:21,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:23:21,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:23:22,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:23:22,019 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:23:22,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:23:22,053 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:23:22,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22 WrapperNode [2020-10-28 17:23:22,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:23:22,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:23:22,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:23:22,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:23:22,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (1/1) ... [2020-10-28 17:23:22,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (1/1) ... [2020-10-28 17:23:22,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (1/1) ... [2020-10-28 17:23:22,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (1/1) ... [2020-10-28 17:23:22,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (1/1) ... [2020-10-28 17:23:22,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (1/1) ... [2020-10-28 17:23:22,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (1/1) ... [2020-10-28 17:23:22,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:23:22,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:23:22,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:23:22,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:23:22,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (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 [2020-10-28 17:23:22,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:23:22,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:23:22,164 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:23:22,164 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-28 17:23:22,165 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-28 17:23:22,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:23:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 17:23:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:23:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:23:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:23:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:23:22,166 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-28 17:23:22,166 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-28 17:23:22,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:23:22,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:23:22,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:23:22,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:23:22,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:23:22,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:23:22,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:23:22,399 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:23:22,399 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 17:23:22,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:23:22 BoogieIcfgContainer [2020-10-28 17:23:22,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:23:22,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:23:22,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:23:22,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:23:22,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:23:21" (1/3) ... [2020-10-28 17:23:22,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c6d64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:23:22, skipping insertion in model container [2020-10-28 17:23:22,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:22" (2/3) ... [2020-10-28 17:23:22,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c6d64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:23:22, skipping insertion in model container [2020-10-28 17:23:22,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:23:22" (3/3) ... [2020-10-28 17:23:22,410 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2020-10-28 17:23:22,423 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:23:22,428 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:23:22,443 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:23:22,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:23:22,539 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:23:22,539 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:23:22,539 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:23:22,539 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:23:22,540 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:23:22,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:23:22,543 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:23:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-28 17:23:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 17:23:22,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:22,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:23:22,614 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash 791772439, now seen corresponding path program 1 times [2020-10-28 17:23:22,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:22,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724039985] [2020-10-28 17:23:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:23,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:23,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:23:23,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-28 17:23:23,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:23,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 17:23:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:23,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 17:23:23,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:23,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:23,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:23,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:23,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:23,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 17:23:23,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:23,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:23,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:23,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:23,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:23,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:23,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:23,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:23,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:23,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:23,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:23,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 17:23:23,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:23,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:23,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:23:23,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:23,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:23:23,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724039985] [2020-10-28 17:23:23,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:23,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:23:23,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131953953] [2020-10-28 17:23:23,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:23:23,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:23,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:23:23,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:23:23,543 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-10-28 17:23:23,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:23,905 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 17:23:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:23:23,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 17:23:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:23,916 INFO L225 Difference]: With dead ends: 46 [2020-10-28 17:23:23,917 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 17:23:23,920 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 [2020-10-28 17:23:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 17:23:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 17:23:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 17:23:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-28 17:23:23,969 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-10-28 17:23:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:23,969 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-28 17:23:23,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:23:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-28 17:23:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 17:23:23,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:23,972 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] [2020-10-28 17:23:23,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:23:23,973 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2001775916, now seen corresponding path program 1 times [2020-10-28 17:23:23,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:23,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523765926] [2020-10-28 17:23:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:24,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:24,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:24,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:24,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 17:23:24,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:24,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-28 17:23:24,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:24,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 17:23:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:24,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 17:23:24,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:24,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:24,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:24,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:24,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:23:24,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:24,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:24,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:24,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:24,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:24,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:24,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:24,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:23:24,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:24,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 17:23:24,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:24,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:24,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:24,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-28 17:23:24,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:24,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:24,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:24,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:24,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:24,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:24,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:23:24,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:24,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:23:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:24,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:24,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:23:24,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523765926] [2020-10-28 17:23:24,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:24,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:23:24,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761941191] [2020-10-28 17:23:24,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:23:24,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:24,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:23:24,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:23:24,576 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-10-28 17:23:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:24,797 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-28 17:23:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:23:24,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 17:23:24,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:24,799 INFO L225 Difference]: With dead ends: 47 [2020-10-28 17:23:24,799 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 17:23:24,801 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 [2020-10-28 17:23:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 17:23:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-28 17:23:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 17:23:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 17:23:24,811 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-28 17:23:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:24,811 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 17:23:24,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:23:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 17:23:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 17:23:24,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:24,813 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] [2020-10-28 17:23:24,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:23:24,813 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1405687699, now seen corresponding path program 1 times [2020-10-28 17:23:24,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:24,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839228362] [2020-10-28 17:23:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:24,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:24,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:24,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 17:23:24,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:24,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 17:23:24,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:24,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:24,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 17:23:24,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:23:24,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:24,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:24,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:25,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:25,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:25,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:25,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:23:25,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:25,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:25,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:25,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:25,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:25,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:25,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:25,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:25,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:25,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:23:25,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 17:23:25,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:25,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:23:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:25,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 17:23:25,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:25,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:25,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:25,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:25,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:25,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:23:25,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:25,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:25,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:25,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:23:25,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839228362] [2020-10-28 17:23:25,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:25,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:23:25,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567519345] [2020-10-28 17:23:25,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:23:25,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:25,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:23:25,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:23:25,083 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-28 17:23:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:25,300 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-28 17:23:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:23:25,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 17:23:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:25,301 INFO L225 Difference]: With dead ends: 32 [2020-10-28 17:23:25,301 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 17:23:25,302 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 [2020-10-28 17:23:25,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 17:23:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 17:23:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 17:23:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 17:23:25,303 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-28 17:23:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:25,303 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 17:23:25,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:23:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 17:23:25,304 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 17:23:25,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 17:23:25,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 17:23:25,395 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-28 17:23:25,396 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-28 17:23:25,396 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-28 17:23:25,396 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-28 17:23:25,396 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 17:23:25,396 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|)) [2020-10-28 17:23:25,396 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 17:23:25,397 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-28 17:23:25,397 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-28 17:23:25,397 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-10-28 17:23:25,397 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-10-28 17:23:25,397 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-28 17:23:25,397 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-10-28 17:23:25,397 INFO L277 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-10-28 17:23:25,397 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 17:23:25,398 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 17:23:25,398 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 17:23:25,398 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 17:23:25,398 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 23 29) the Hoare annotation is: true [2020-10-28 17:23:25,398 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: false [2020-10-28 17:23:25,398 INFO L274 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-10-28 17:23:25,398 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-10-28 17:23:25,398 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-28 17:23:25,399 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 23 29) no Hoare annotation was computed. [2020-10-28 17:23:25,399 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-28 17:23:25,399 INFO L274 CegarLoopResult]: For program point L26-2(lines 23 29) no Hoare annotation was computed. [2020-10-28 17:23:25,399 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-10-28 17:23:25,399 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-28 17:23:25,399 INFO L277 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-10-28 17:23:25,399 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-10-28 17:23:25,399 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-10-28 17:23:25,400 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-10-28 17:23:25,400 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-10-28 17:23:25,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 05:23:25 BoogieIcfgContainer [2020-10-28 17:23:25,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 17:23:25,410 INFO L168 Benchmark]: Toolchain (without parser) took 3598.72 ms. Allocated memory was 125.8 MB in the beginning and 162.5 MB in the end (delta: 36.7 MB). Free memory was 101.1 MB in the beginning and 103.8 MB in the end (delta: -2.7 MB). Peak memory consumption was 34.8 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:25,411 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 17:23:25,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.23 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 91.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:25,413 INFO L168 Benchmark]: Boogie Preprocessor took 32.06 ms. Allocated memory is still 125.8 MB. Free memory was 91.3 MB in the beginning and 89.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:25,414 INFO L168 Benchmark]: RCFGBuilder took 313.73 ms. Allocated memory is still 125.8 MB. Free memory was 89.9 MB in the beginning and 76.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:25,415 INFO L168 Benchmark]: TraceAbstraction took 3004.61 ms. Allocated memory was 125.8 MB in the beginning and 162.5 MB in the end (delta: 36.7 MB). Free memory was 75.8 MB in the beginning and 103.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:25,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.23 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 91.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.06 ms. Allocated memory is still 125.8 MB. Free memory was 91.3 MB in the beginning and 89.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 313.73 ms. Allocated memory is still 125.8 MB. Free memory was 89.9 MB in the beginning and 76.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3004.61 ms. Allocated memory was 125.8 MB in the beginning and 162.5 MB in the end (delta: 36.7 MB). Free memory was 75.8 MB in the beginning and 103.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 9.6 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: 2.7s, 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, 0.1s 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...