/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/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:23:59,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:23:59,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:23:59,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:23:59,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:23:59,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:23:59,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:23:59,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:23:59,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:23:59,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:23:59,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:23:59,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:23:59,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:23:59,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:23:59,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:23:59,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:23:59,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:23:59,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:23:59,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:23:59,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:23:59,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:23:59,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:23:59,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:23:59,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:23:59,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:23:59,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:23:59,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:23:59,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:23:59,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:23:59,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:23:59,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:23:59,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:23:59,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:23:59,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:23:59,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:23:59,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:23:59,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:23:59,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:23:59,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:23:59,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:23:59,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:23:59,235 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 17:23:59,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:23:59,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:23:59,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:23:59,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:23:59,297 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:23:59,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:23:59,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:23:59,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:23:59,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:23:59,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:23:59,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:23:59,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:23:59,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:23:59,300 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:23:59,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:23:59,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:23:59,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:23:59,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:23:59,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:23:59,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:23:59,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:23:59,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:23:59,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:23:59,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:23:59,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:23:59,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:23:59,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:23:59,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:23:59,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:23:59,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:23:59,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:23:59,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:23:59,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:23:59,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:23:59,761 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:23:59,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-28 17:23:59,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7b09b77a/4eff668bfb1c41ce809de1729ac7d2f6/FLAG69a20cc0e [2020-10-28 17:24:00,469 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:24:00,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-10-28 17:24:00,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7b09b77a/4eff668bfb1c41ce809de1729ac7d2f6/FLAG69a20cc0e [2020-10-28 17:24:00,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7b09b77a/4eff668bfb1c41ce809de1729ac7d2f6 [2020-10-28 17:24:00,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:24:00,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:24:00,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:24:00,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:24:00,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:24:00,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:24:00" (1/1) ... [2020-10-28 17:24:00,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7d27ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:00, skipping insertion in model container [2020-10-28 17:24:00,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:24:00" (1/1) ... [2020-10-28 17:24:00,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:24:00,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:24:01,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:24:01,053 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:24:01,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:24:01,088 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:24:01,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01 WrapperNode [2020-10-28 17:24:01,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:24:01,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:24:01,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:24:01,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:24:01,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (1/1) ... [2020-10-28 17:24:01,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (1/1) ... [2020-10-28 17:24:01,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (1/1) ... [2020-10-28 17:24:01,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (1/1) ... [2020-10-28 17:24:01,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (1/1) ... [2020-10-28 17:24:01,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (1/1) ... [2020-10-28 17:24:01,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (1/1) ... [2020-10-28 17:24:01,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:24:01,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:24:01,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:24:01,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:24:01,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (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 17:24:01,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:24:01,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:24:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:24:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-28 17:24:01,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:24:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 17:24:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:24:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:24:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:24:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:24:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-28 17:24:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:24:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:24:01,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:24:01,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:24:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:24:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:24:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:24:01,634 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:24:01,635 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 17:24:01,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:24:01 BoogieIcfgContainer [2020-10-28 17:24:01,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:24:01,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:24:01,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:24:01,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:24:01,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:24:00" (1/3) ... [2020-10-28 17:24:01,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10123524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:24:01, skipping insertion in model container [2020-10-28 17:24:01,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:24:01" (2/3) ... [2020-10-28 17:24:01,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10123524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:24:01, skipping insertion in model container [2020-10-28 17:24:01,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:24:01" (3/3) ... [2020-10-28 17:24:01,664 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-10-28 17:24:01,690 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:24:01,703 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:24:01,717 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:24:01,745 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:24:01,745 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:24:01,745 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:24:01,745 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:24:01,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:24:01,746 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:24:01,746 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:24:01,746 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:24:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 17:24:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 17:24:01,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:24:01,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:24:01,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:24:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:24:01,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1397195593, now seen corresponding path program 1 times [2020-10-28 17:24:01,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:24:01,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060541770] [2020-10-28 17:24:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:24:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:01,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:02,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:02,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:24:02,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:02,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-28 17:24:02,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:02,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:02,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:24:02,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 17:24:02,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:24:02,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 17:24:02,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:24:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:02,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:02,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:24:02,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:02,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 17:24:02,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:02,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:24:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:24:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:24:02,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:24:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:02,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:02,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:24:02,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:02,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 17:24:02,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:02,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:02,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:24:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:24:02,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:24:02,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:02,476 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 17:24:02,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060541770] [2020-10-28 17:24:02,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:24:02,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:24:02,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158226157] [2020-10-28 17:24:02,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:24:02,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:24:02,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:24:02,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:24:02,501 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-28 17:24:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:24:02,787 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-28 17:24:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:24:02,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 17:24:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:24:02,798 INFO L225 Difference]: With dead ends: 39 [2020-10-28 17:24:02,798 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 17:24:02,802 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 17:24:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 17:24:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 17:24:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 17:24:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 17:24:02,850 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-10-28 17:24:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:24:02,850 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 17:24:02,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:24:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 17:24:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 17:24:02,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:24:02,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:24:02,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:24:02,853 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:24:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:24:02,854 INFO L82 PathProgramCache]: Analyzing trace with hash -630540429, now seen corresponding path program 1 times [2020-10-28 17:24:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:24:02,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433021142] [2020-10-28 17:24:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:24:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:02,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:03,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:03,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 17:24:03,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:24:03,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-28 17:24:03,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:03,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:03,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:24:03,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 17:24:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:24:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:03,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:24:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:03,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:03,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:24:03,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:24:03,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:03,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:24:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:24:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:24:03,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:03,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:24:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:03,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:03,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:24:03,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:03,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 17:24:03,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:03,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:03,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:24:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-28 17:24:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:24:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:03,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:24:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:03,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:03,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:03,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:24:03,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:03,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:24:03,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:03,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:24:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:24:03,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:24:03,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 17:24:03,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433021142] [2020-10-28 17:24:03,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:24:03,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:24:03,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053011873] [2020-10-28 17:24:03,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:24:03,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:24:03,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:24:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:24:03,593 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-28 17:24:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:24:03,802 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-28 17:24:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:24:03,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 17:24:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:24:03,804 INFO L225 Difference]: With dead ends: 34 [2020-10-28 17:24:03,804 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 17:24:03,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:24:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 17:24:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-28 17:24:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 17:24:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 17:24:03,814 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2020-10-28 17:24:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:24:03,815 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 17:24:03,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:24:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 17:24:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 17:24:03,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:24:03,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:24:03,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:24:03,817 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:24:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:24:03,818 INFO L82 PathProgramCache]: Analyzing trace with hash 256963252, now seen corresponding path program 1 times [2020-10-28 17:24:03,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:24:03,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251685470] [2020-10-28 17:24:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:24:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:03,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:03,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:03,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 17:24:03,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:03,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 17:24:03,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:03,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:24:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 17:24:03,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:24:03,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:03,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:24:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:03,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:03,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:03,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:24:03,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:24:03,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:03,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:24:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:24:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:24:03,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:03,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:24:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:03,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:03,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 17:24:03,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:03,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 17:24:03,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:03,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:04,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:24:04,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:24:04,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 17:24:04,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:04,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:24:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:24:04,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:24:04,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:24:04,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:24:04,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:24:04,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:24:04,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:24:04,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:24:04,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:24:04,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:24:04,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:24:04,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:24:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 17:24:04,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251685470] [2020-10-28 17:24:04,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:24:04,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:24:04,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527488499] [2020-10-28 17:24:04,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:24:04,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:24:04,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:24:04,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:24:04,052 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-28 17:24:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:24:04,229 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-28 17:24:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:24:04,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 17:24:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:24:04,230 INFO L225 Difference]: With dead ends: 23 [2020-10-28 17:24:04,230 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 17:24:04,231 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 17:24:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 17:24:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 17:24:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 17:24:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 17:24:04,232 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-28 17:24:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:24:04,232 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 17:24:04,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:24:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 17:24:04,233 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 17:24:04,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 17:24:04,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 17:24:04,324 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-28 17:24:04,324 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-28 17:24:04,324 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-28 17:24:04,325 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-28 17:24:04,325 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 17:24:04,325 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 17:24:04,325 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 17:24:04,325 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 17:24:04,326 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 17:24:04,326 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 17:24:04,326 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 17:24:04,326 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2020-10-28 17:24:04,326 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 19) no Hoare annotation was computed. [2020-10-28 17:24:04,326 INFO L270 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-10-28 17:24:04,326 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-10-28 17:24:04,327 INFO L274 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-10-28 17:24:04,327 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-10-28 17:24:04,327 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-28 17:24:04,327 INFO L274 CegarLoopResult]: For program point L16-2(lines 13 19) no Hoare annotation was computed. [2020-10-28 17:24:04,327 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2020-10-28 17:24:04,327 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-28 17:24:04,327 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-28 17:24:04,328 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-10-28 17:24:04,328 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-10-28 17:24:04,328 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-28 17:24:04,328 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-28 17:24:04,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 05:24:04 BoogieIcfgContainer [2020-10-28 17:24:04,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 17:24:04,337 INFO L168 Benchmark]: Toolchain (without parser) took 3473.00 ms. Allocated memory was 154.1 MB in the beginning and 187.7 MB in the end (delta: 33.6 MB). Free memory was 129.3 MB in the beginning and 137.3 MB in the end (delta: -8.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:24:04,337 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 154.1 MB. Free memory is still 129.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 17:24:04,338 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.23 ms. Allocated memory is still 154.1 MB. Free memory was 128.8 MB in the beginning and 119.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:24:04,339 INFO L168 Benchmark]: Boogie Preprocessor took 32.56 ms. Allocated memory is still 154.1 MB. Free memory was 119.1 MB in the beginning and 117.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 17:24:04,340 INFO L168 Benchmark]: RCFGBuilder took 517.14 ms. Allocated memory is still 154.1 MB. Free memory was 117.7 MB in the beginning and 105.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 17:24:04,341 INFO L168 Benchmark]: TraceAbstraction took 2688.33 ms. Allocated memory was 154.1 MB in the beginning and 187.7 MB in the end (delta: 33.6 MB). Free memory was 105.0 MB in the beginning and 137.3 MB in the end (delta: -32.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 8.0 GB. [2020-10-28 17:24:04,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 154.1 MB. Free memory is still 129.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.23 ms. Allocated memory is still 154.1 MB. Free memory was 128.8 MB in the beginning and 119.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.56 ms. Allocated memory is still 154.1 MB. Free memory was 119.1 MB in the beginning and 117.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 517.14 ms. Allocated memory is still 154.1 MB. Free memory was 117.7 MB in the beginning and 105.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2688.33 ms. Allocated memory was 154.1 MB in the beginning and 187.7 MB in the end (delta: 33.6 MB). Free memory was 105.0 MB in the beginning and 137.3 MB in the end (delta: -32.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 42 SDslu, 73 SDs, 0 SdLazy, 140 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 13 PreInvPairs, 13 NumberOfFragments, 39 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 120 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 4494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...