/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:27:26,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:27:26,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:27:26,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:27:26,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:27:26,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:27:26,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:27:26,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:27:26,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:27:26,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:27:26,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:27:26,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:27:26,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:27:26,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:27:26,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:27:26,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:27:26,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:27:26,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:27:26,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:27:26,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:27:26,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:27:26,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:27:26,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:27:26,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:27:26,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:27:26,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:27:26,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:27:26,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:27:26,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:27:26,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:27:26,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:27:26,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:27:26,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:27:26,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:27:26,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:27:26,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:27:26,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:27:26,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:27:26,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:27:26,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:27:26,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:27:26,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 12:27:26,908 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:27:26,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:27:26,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:27:26,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:27:26,910 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:27:26,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:27:26,911 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:27:26,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:27:26,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:27:26,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:27:26,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:27:26,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:27:26,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:27:26,912 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:27:26,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:27:26,912 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:27:26,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:27:26,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:27:26,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:27:26,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:27:26,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:27:26,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:27:26,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:27:26,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:27:26,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:27:26,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:27:26,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:27:26,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:27:26,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:27:26,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:27:27,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:27:27,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:27:27,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:27:27,378 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:27:27,378 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:27:27,379 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-21 12:27:27,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b424e590a/1ebd7d5c461d44eabc0d125452d3b4ea/FLAG7e38112a3 [2020-09-21 12:27:28,013 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:27:28,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-21 12:27:28,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b424e590a/1ebd7d5c461d44eabc0d125452d3b4ea/FLAG7e38112a3 [2020-09-21 12:27:28,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b424e590a/1ebd7d5c461d44eabc0d125452d3b4ea [2020-09-21 12:27:28,317 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:27:28,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:27:28,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:27:28,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:27:28,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:27:28,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63983835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:28, skipping insertion in model container [2020-09-21 12:27:28,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:28" (1/1) ... [2020-09-21 12:27:28,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:27:28,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:27:28,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:27:28,887 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:27:28,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:27:29,018 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:27:29,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29 WrapperNode [2020-09-21 12:27:29,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:27:29,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:27:29,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:27:29,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:27:29,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (1/1) ... [2020-09-21 12:27:29,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (1/1) ... [2020-09-21 12:27:29,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (1/1) ... [2020-09-21 12:27:29,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (1/1) ... [2020-09-21 12:27:29,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (1/1) ... [2020-09-21 12:27:29,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (1/1) ... [2020-09-21 12:27:29,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (1/1) ... [2020-09-21 12:27:29,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:27:29,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:27:29,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:27:29,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:27:29,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:27:29,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:27:29,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:27:29,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 12:27:29,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 12:27:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 12:27:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-21 12:27:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-21 12:27:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-21 12:27:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:27:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:27:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:27:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 12:27:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 12:27:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 12:27:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 12:27:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 12:27:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 12:27:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 12:27:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 12:27:29,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 12:27:29,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 12:27:29,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 12:27:29,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 12:27:29,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 12:27:29,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 12:27:29,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 12:27:29,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 12:27:29,172 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 12:27:29,172 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 12:27:29,172 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 12:27:29,173 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 12:27:29,173 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 12:27:29,173 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 12:27:29,173 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 12:27:29,173 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 12:27:29,174 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 12:27:29,174 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 12:27:29,174 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 12:27:29,174 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 12:27:29,174 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 12:27:29,174 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 12:27:29,175 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 12:27:29,175 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 12:27:29,175 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 12:27:29,175 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 12:27:29,175 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 12:27:29,175 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 12:27:29,176 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 12:27:29,176 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 12:27:29,176 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 12:27:29,176 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 12:27:29,176 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 12:27:29,176 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 12:27:29,177 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 12:27:29,177 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 12:27:29,177 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 12:27:29,177 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 12:27:29,177 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 12:27:29,177 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 12:27:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 12:27:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 12:27:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 12:27:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 12:27:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:27:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:27:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 12:27:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:27:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 12:27:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 12:27:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 12:27:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 12:27:29,180 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 12:27:29,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:27:29,180 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 12:27:29,180 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 12:27:29,180 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 12:27:29,180 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:27:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 12:27:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 12:27:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 12:27:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 12:27:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 12:27:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 12:27:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 12:27:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 12:27:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 12:27:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 12:27:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 12:27:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 12:27:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 12:27:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 12:27:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 12:27:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 12:27:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 12:27:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 12:27:29,183 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 12:27:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 12:27:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 12:27:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 12:27:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 12:27:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 12:27:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 12:27:29,184 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 12:27:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 12:27:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 12:27:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 12:27:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 12:27:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 12:27:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 12:27:29,185 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 12:27:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 12:27:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 12:27:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 12:27:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 12:27:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 12:27:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 12:27:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 12:27:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-21 12:27:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:27:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:27:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-21 12:27:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:27:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-21 12:27:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:27:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:27:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:27:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:27:29,539 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 12:27:29,693 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:27:29,694 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 12:27:29,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:29 BoogieIcfgContainer [2020-09-21 12:27:29,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:27:29,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:27:29,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:27:29,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:27:29,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:27:28" (1/3) ... [2020-09-21 12:27:29,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372655b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:29, skipping insertion in model container [2020-09-21 12:27:29,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:29" (2/3) ... [2020-09-21 12:27:29,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372655b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:29, skipping insertion in model container [2020-09-21 12:27:29,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:29" (3/3) ... [2020-09-21 12:27:29,709 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-09-21 12:27:29,721 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:27:29,731 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:27:29,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:27:29,786 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:27:29,786 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:27:29,787 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:27:29,787 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:27:29,787 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:27:29,787 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:27:29,787 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:27:29,787 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:27:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-09-21 12:27:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:27:29,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:29,820 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, 1] [2020-09-21 12:27:29,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-09-21 12:27:29,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:29,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206068995] [2020-09-21 12:27:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:30,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:27:30,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:27:30,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-09-21 12:27:30,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:27:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:27:30,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:30,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:30,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:30,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:27:30,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:30,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:30,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:30,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 12:27:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:30,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:30,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 12:27:30,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:27:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:30,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:30,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 12:27:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:30,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:30,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:30,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 12:27:30,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 12:27:30,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:30,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:30,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206068995] [2020-09-21 12:27:30,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:30,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:27:30,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708939629] [2020-09-21 12:27:30,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:27:30,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:27:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:27:30,466 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-09-21 12:27:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:30,658 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-09-21 12:27:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:27:30,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-09-21 12:27:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:30,672 INFO L225 Difference]: With dead ends: 90 [2020-09-21 12:27:30,673 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 12:27:30,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:27:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 12:27:30,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-09-21 12:27:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 12:27:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-09-21 12:27:30,733 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-09-21 12:27:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:30,734 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-09-21 12:27:30,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:27:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-09-21 12:27:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:27:30,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:30,735 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, 1, 1, 1] [2020-09-21 12:27:30,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:27:30,736 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:30,736 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-09-21 12:27:30,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:30,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802342363] [2020-09-21 12:27:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:30,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:27:30,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:30,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-21 12:27:30,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:30,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:30,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:27:30,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:27:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:31,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:31,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:31,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:27:31,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:31,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:31,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:27:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:31,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:31,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:31,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 12:27:31,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:31,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:31,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:31,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:27:31,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:31,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 12:27:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:31,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:31,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:31,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:27:31,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:27:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:31,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:31,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802342363] [2020-09-21 12:27:31,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:31,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 12:27:31,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068547740] [2020-09-21 12:27:31,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:27:31,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:31,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:27:31,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:27:31,130 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-09-21 12:27:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:31,337 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-21 12:27:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:27:31,337 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-21 12:27:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:31,339 INFO L225 Difference]: With dead ends: 45 [2020-09-21 12:27:31,339 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:27:31,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:27:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:27:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-09-21 12:27:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:27:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-09-21 12:27:31,348 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-09-21 12:27:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:31,349 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-09-21 12:27:31,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:27:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-09-21 12:27:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:27:31,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:31,350 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, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:31,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:27:31,351 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:31,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-09-21 12:27:31,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:31,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464836017] [2020-09-21 12:27:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:27:32,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:27:32,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:27:32,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:27:32,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:32,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:27:32,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:32,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:32,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:32,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:27:32,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:32,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:32,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:32,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:27:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 12:27:32,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:32,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-21 12:27:32,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:27:32,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:32,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:27:32,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:32,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 12:27:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:32,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:32,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:27:32,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:27:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:32,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464836017] [2020-09-21 12:27:32,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:32,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:27:32,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821559302] [2020-09-21 12:27:32,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:27:32,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:27:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:27:32,562 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-09-21 12:27:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:32,736 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-09-21 12:27:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:27:32,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-21 12:27:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:32,738 INFO L225 Difference]: With dead ends: 48 [2020-09-21 12:27:32,738 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 12:27:32,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:27:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 12:27:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-21 12:27:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 12:27:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-21 12:27:32,746 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-09-21 12:27:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:32,746 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-21 12:27:32,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:27:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-21 12:27:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:27:32,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:32,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:32,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:27:32,748 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:32,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1166508097, now seen corresponding path program 2 times [2020-09-21 12:27:32,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:32,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499028353] [2020-09-21 12:27:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:33,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:27:33,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:27:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-21 12:27:33,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:27:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:33,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:27:33,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:33,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:33,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:33,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:33,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:33,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:33,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:33,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:33,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:33,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:33,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:33,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:27:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:33,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:33,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:27:33,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:33,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-21 12:27:33,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:27:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:27:33,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:34,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 12:27:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:34,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:34,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:34,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:34,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:27:34,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:34,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:34,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:27:34,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:34,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499028353] [2020-09-21 12:27:34,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:34,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:27:34,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598800510] [2020-09-21 12:27:34,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:27:34,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:27:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:27:34,047 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-09-21 12:27:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:34,325 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-21 12:27:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:34,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-21 12:27:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:34,327 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:27:34,327 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 12:27:34,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:27:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 12:27:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-09-21 12:27:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:27:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-09-21 12:27:34,335 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-09-21 12:27:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:34,336 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-09-21 12:27:34,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:27:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-09-21 12:27:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 12:27:34,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:34,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:34,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:27:34,338 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1706812894, now seen corresponding path program 3 times [2020-09-21 12:27:34,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:34,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522404324] [2020-09-21 12:27:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:34,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:34,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 12:27:34,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:34,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-09-21 12:27:34,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:27:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:27:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:27:34,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:34,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:34,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:34,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:34,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:34,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:34,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:34,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:34,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:34,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:34,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:34,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:27:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:34,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:27:34,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:34,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-21 12:27:34,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:34,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:27:34,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:27:34,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 12:27:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:35,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:35,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:35,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:27:35,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:35,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 12:27:35,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:35,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:27:35,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 12:27:35,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522404324] [2020-09-21 12:27:35,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:35,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 12:27:35,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708930897] [2020-09-21 12:27:35,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:27:35,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:35,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:27:35,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:27:35,089 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-09-21 12:27:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:35,362 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-09-21 12:27:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:35,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-09-21 12:27:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:35,364 INFO L225 Difference]: With dead ends: 43 [2020-09-21 12:27:35,364 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 12:27:35,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:27:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 12:27:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-21 12:27:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:27:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-21 12:27:35,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2020-09-21 12:27:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:35,372 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-21 12:27:35,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:27:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-21 12:27:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 12:27:35,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:35,374 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:35,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:27:35,374 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:35,375 INFO L82 PathProgramCache]: Analyzing trace with hash 991320762, now seen corresponding path program 1 times [2020-09-21 12:27:35,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:35,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20750178] [2020-09-21 12:27:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:35,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:35,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:36,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:36,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:27:36,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:36,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-09-21 12:27:36,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:36,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:27:36,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 12:27:36,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:27:36,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:36,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:36,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:36,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:36,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:36,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:36,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:36,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:36,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:36,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:27:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:36,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:36,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:36,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:36,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:27:36,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:36,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-09-21 12:27:36,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:27:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:27:36,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:36,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 12:27:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:36,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:36,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:36,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:27:36,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:36,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 12:27:36,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:36,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:27:36,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:27:36,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:27:36,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:27:36,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20750178] [2020-09-21 12:27:36,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:36,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 12:27:36,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5054610] [2020-09-21 12:27:36,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 12:27:36,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:36,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 12:27:36,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:27:36,611 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 13 states. [2020-09-21 12:27:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:37,028 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-09-21 12:27:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:27:37,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-09-21 12:27:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:37,030 INFO L225 Difference]: With dead ends: 44 [2020-09-21 12:27:37,030 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 12:27:37,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-21 12:27:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 12:27:37,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 12:27:37,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:27:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-09-21 12:27:37,037 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2020-09-21 12:27:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:37,037 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-09-21 12:27:37,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 12:27:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-09-21 12:27:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 12:27:37,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:37,039 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:37,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:27:37,039 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 2 times [2020-09-21 12:27:37,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:37,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374926636] [2020-09-21 12:27:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:37,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:37,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:37,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:38,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:38,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 12:27:38,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:27:38,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-21 12:27:38,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:27:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 12:27:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:38,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:38,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:38,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:38,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:38,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:38,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:38,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:38,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:38,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 12:27:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:38,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:38,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:38,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:27:38,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:38,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-21 12:27:38,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:38,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:27:38,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:38,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:27:38,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:38,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 12:27:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:38,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:38,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:38,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 12:27:38,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:38,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-21 12:27:38,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:27:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:38,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:27:38,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 12:27:38,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374926636] [2020-09-21 12:27:38,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:38,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:27:38,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818174122] [2020-09-21 12:27:38,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:27:38,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:27:38,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:27:38,455 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-09-21 12:27:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:38,742 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-09-21 12:27:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:38,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-21 12:27:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:38,746 INFO L225 Difference]: With dead ends: 55 [2020-09-21 12:27:38,746 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 12:27:38,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-21 12:27:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 12:27:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-09-21 12:27:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 12:27:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-09-21 12:27:38,757 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-09-21 12:27:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:38,757 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-09-21 12:27:38,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:27:38,757 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-09-21 12:27:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 12:27:38,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:38,760 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:38,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:27:38,761 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:38,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 3 times [2020-09-21 12:27:38,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:38,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677781688] [2020-09-21 12:27:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:27:38,789 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:27:38,789 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:27:38,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:27:38,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:27:38 BoogieIcfgContainer [2020-09-21 12:27:38,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:27:38,827 INFO L168 Benchmark]: Toolchain (without parser) took 10506.65 ms. Allocated memory was 147.3 MB in the beginning and 308.3 MB in the end (delta: 161.0 MB). Free memory was 102.2 MB in the beginning and 208.5 MB in the end (delta: -106.2 MB). Peak memory consumption was 54.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:38,827 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:27:38,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.43 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 101.6 MB in the beginning and 169.7 MB in the end (delta: -68.1 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:38,829 INFO L168 Benchmark]: Boogie Preprocessor took 65.46 ms. Allocated memory is still 203.4 MB. Free memory was 169.7 MB in the beginning and 167.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:38,830 INFO L168 Benchmark]: RCFGBuilder took 613.66 ms. Allocated memory is still 203.4 MB. Free memory was 167.0 MB in the beginning and 124.3 MB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:38,831 INFO L168 Benchmark]: TraceAbstraction took 9123.20 ms. Allocated memory was 203.4 MB in the beginning and 308.3 MB in the end (delta: 104.9 MB). Free memory was 123.6 MB in the beginning and 208.5 MB in the end (delta: -84.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:38,834 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 695.43 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 101.6 MB in the beginning and 169.7 MB in the end (delta: -68.1 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.46 ms. Allocated memory is still 203.4 MB. Free memory was 169.7 MB in the beginning and 167.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 613.66 ms. Allocated memory is still 203.4 MB. Free memory was 167.0 MB in the beginning and 124.3 MB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9123.20 ms. Allocated memory was 203.4 MB in the beginning and 308.3 MB in the end (delta: 104.9 MB). Free memory was 123.6 MB in the beginning and 208.5 MB in the end (delta: -84.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] RET, EXPR sll_create(len + 1) [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] RET, EXPR sll_length(s) [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 295 SDslu, 489 SDs, 0 SdLazy, 880 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, 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, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 205 ConstructedInterpolants, 0 QuantifiedInterpolants, 22210 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 34/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...