/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/loops-crafted-1/discover_list.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:03:49,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:03:49,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:03:49,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:03:49,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:03:49,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:03:49,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:03:49,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:03:49,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:03:49,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:03:49,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:03:49,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:03:49,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:03:49,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:03:49,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:03:49,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:03:49,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:03:49,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:03:49,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:03:49,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:03:49,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:03:49,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:03:49,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:03:49,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:03:50,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:03:50,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:03:50,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:03:50,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:03:50,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:03:50,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:03:50,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:03:50,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:03:50,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:03:50,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:03:50,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:03:50,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:03:50,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:03:50,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:03:50,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:03:50,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:03:50,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:03:50,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:03:50,039 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:03:50,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:03:50,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:03:50,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:03:50,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:03:50,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:03:50,041 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:03:50,042 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:03:50,042 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:03:50,042 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:03:50,043 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:03:50,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:03:50,043 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:03:50,043 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:03:50,043 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:03:50,044 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:03:50,044 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:03:50,044 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:03:50,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:03:50,045 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:03:50,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:03:50,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:03:50,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:03:50,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:03:50,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:03:50,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:03:50,046 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:03:50,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:03:50,046 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:03:50,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:03:50,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:03:50,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:03:50,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:03:50,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:03:50,047 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:03:50,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:03:50,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:03:50,047 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:03:50,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:03:50,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:03:50,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:03:50,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:03:50,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:03:50,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:03:50,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:03:50,317 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:03:50,317 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:03:50,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/discover_list.c [2023-03-31 23:03:51,529 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:03:51,741 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:03:51,742 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c [2023-03-31 23:03:51,753 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0311a3ae9/dfb2b7fa17224e89a5ff02a6146b653f/FLAG005f5b61d [2023-03-31 23:03:51,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0311a3ae9/dfb2b7fa17224e89a5ff02a6146b653f [2023-03-31 23:03:51,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:03:51,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:03:51,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:03:51,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:03:51,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:03:51,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:03:51" (1/1) ... [2023-03-31 23:03:51,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@169ec49a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:51, skipping insertion in model container [2023-03-31 23:03:51,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:03:51" (1/1) ... [2023-03-31 23:03:51,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:03:51,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:03:52,049 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c[4997,5010] [2023-03-31 23:03:52,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:03:52,169 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:03:52,188 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/discover_list.c[4997,5010] [2023-03-31 23:03:52,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:03:52,254 WARN L667 CHandler]: The function smp_send_req is called, but not defined or handled by StandardFunctionHandler. [2023-03-31 23:03:52,254 WARN L667 CHandler]: The function toupper is called, but not defined or handled by StandardFunctionHandler. [2023-03-31 23:03:52,255 WARN L667 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-03-31 23:03:52,264 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:03:52,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52 WrapperNode [2023-03-31 23:03:52,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:03:52,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:03:52,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:03:52,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:03:52,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,369 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:03:52,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:03:52,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:03:52,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:03:52,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (1/1) ... [2023-03-31 23:03:52,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:03:52,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:03:52,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:03:52,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:03:52,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:03:52,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_func_def_resp_len [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_is_naa5 [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure dStrHex [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_num [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure smp_get_llnum [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure do_discover_list [2023-03-31 23:03:52,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:03:52,480 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 23:03:52,480 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure getopt_long [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure smp_initiator_open [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_func_def_resp_len [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure smp_is_naa5 [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure dStrHex [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_num [2023-03-31 23:03:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure smp_get_llnum [2023-03-31 23:03:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure do_discover_list [2023-03-31 23:03:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure main6 [2023-03-31 23:03:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-03-31 23:03:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure toupper [2023-03-31 23:03:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:03:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:03:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 23:03:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:03:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-03-31 23:03:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:03:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:03:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:03:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:03:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:03:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:03:52,712 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:03:52,714 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:03:53,620 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:03:54,052 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:03:54,053 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:03:54,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:03:54 BoogieIcfgContainer [2023-03-31 23:03:54,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:03:54,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:03:54,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:03:54,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:03:54,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:03:51" (1/3) ... [2023-03-31 23:03:54,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0d22bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:03:54, skipping insertion in model container [2023-03-31 23:03:54,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:52" (2/3) ... [2023-03-31 23:03:54,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0d22bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:03:54, skipping insertion in model container [2023-03-31 23:03:54,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:03:54" (3/3) ... [2023-03-31 23:03:54,065 INFO L112 eAbstractionObserver]: Analyzing ICFG discover_list.c [2023-03-31 23:03:54,081 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:03:54,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:03:54,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:03:54,137 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@125860cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:03:54,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:03:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 45 states have internal predecessors, (60), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-31 23:03:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 23:03:54,148 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:03:54,149 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-03-31 23:03:54,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:03:54,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:03:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash 744927749, now seen corresponding path program 1 times [2023-03-31 23:03:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:03:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034719298] [2023-03-31 23:03:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:03:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:03:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:03:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:03:54,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:03:54,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034719298] [2023-03-31 23:03:54,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034719298] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:03:54,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834044564] [2023-03-31 23:03:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:03:54,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:03:54,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:03:54,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:03:54,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:03:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:03:55,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:03:55,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:03:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:03:55,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:03:55,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834044564] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:03:55,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:03:55,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-03-31 23:03:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475389758] [2023-03-31 23:03:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:03:55,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:03:55,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:03:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:03:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:03:55,273 INFO L87 Difference]: Start difference. First operand has 65 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 45 states have internal predecessors, (60), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:03:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:03:55,439 INFO L93 Difference]: Finished difference Result 124 states and 175 transitions. [2023-03-31 23:03:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 23:03:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-03-31 23:03:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:03:55,454 INFO L225 Difference]: With dead ends: 124 [2023-03-31 23:03:55,454 INFO L226 Difference]: Without dead ends: 57 [2023-03-31 23:03:55,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:03:55,460 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:03:55,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 203 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:03:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-31 23:03:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-03-31 23:03:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 13 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:03:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-03-31 23:03:55,491 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 32 [2023-03-31 23:03:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:03:55,491 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-03-31 23:03:55,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:03:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-03-31 23:03:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 23:03:55,493 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:03:55,493 INFO L195 NwaCegarLoop]: 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, 1, 1, 1] [2023-03-31 23:03:55,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:03:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:03:55,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:03:55,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:03:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash -323444675, now seen corresponding path program 1 times [2023-03-31 23:03:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:03:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264182055] [2023-03-31 23:03:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:03:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:03:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:03:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:03:56,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:03:56,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264182055] [2023-03-31 23:03:56,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264182055] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:03:56,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68438017] [2023-03-31 23:03:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:03:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:03:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:03:56,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:03:56,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:03:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:03:56,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 23:03:56,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:03:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:03:56,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:03:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:03:56,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68438017] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:03:56,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585517928] [2023-03-31 23:03:56,445 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-03-31 23:03:56,445 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:03:56,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:03:56,453 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:03:56,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:03:57,709 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 26 for LOIs [2023-03-31 23:03:57,762 INFO L197 IcfgInterpreter]: Interpreting procedure do_discover_list with input of size 75 for LOIs [2023-03-31 23:03:59,834 INFO L197 IcfgInterpreter]: Interpreting procedure dStrHex with input of size 40 for LOIs [2023-03-31 23:04:00,018 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2023-03-31 23:04:00,037 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 30 for LOIs [2023-03-31 23:04:00,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-03-31 23:04:00,371 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:04:08,259 WARN L223 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 286 DAG size of output: 278 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:04:22,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '623#(and (= ~__tmpTR__int_1~0 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |~#smp_def_rrlen_arr~0.offset| 0) (= |#NULL.offset| 0) (= |~#smp_def_rrlen_arr~0.base| 12) (exists ((|v_#memory_int_409| (Array Int (Array Int Int))) (|v_dStrHex_~#buff~0.base_BEFORE_CALL_3| Int)) (and (= |#memory_int| (store |v_#memory_int_409| |v_dStrHex_~#buff~0.base_BEFORE_CALL_3| (store (select |v_#memory_int_409| |v_dStrHex_~#buff~0.base_BEFORE_CALL_3|) 80 0))) (<= 0 |v_dStrHex_~#buff~0.base_BEFORE_CALL_3|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:04:22,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:04:22,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:04:22,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-03-31 23:04:22,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182325418] [2023-03-31 23:04:22,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:04:22,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:04:22,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:04:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:04:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1195, Unknown=3, NotChecked=0, Total=1332 [2023-03-31 23:04:22,055 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:04:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:04:22,504 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2023-03-31 23:04:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:04:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-03-31 23:04:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:04:22,506 INFO L225 Difference]: With dead ends: 115 [2023-03-31 23:04:22,506 INFO L226 Difference]: Without dead ends: 65 [2023-03-31 23:04:22,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=169, Invalid=1468, Unknown=3, NotChecked=0, Total=1640 [2023-03-31 23:04:22,508 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 5 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:04:22,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:04:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-03-31 23:04:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-03-31 23:04:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:04:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-03-31 23:04:22,517 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 34 [2023-03-31 23:04:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:04:22,517 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-03-31 23:04:22,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:04:22,517 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-03-31 23:04:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 23:04:22,518 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:04:22,518 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1] [2023-03-31 23:04:22,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:04:22,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 23:04:22,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:04:22,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:04:22,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2116992357, now seen corresponding path program 2 times [2023-03-31 23:04:22,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:04:22,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306045848] [2023-03-31 23:04:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:04:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:04:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:04:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:04:23,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:04:23,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306045848] [2023-03-31 23:04:23,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306045848] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:04:23,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543953681] [2023-03-31 23:04:23,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:04:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:04:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:04:23,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:04:23,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:04:24,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 23:04:24,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:04:24,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 23:04:24,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:04:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 23:04:24,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:04:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 23:04:24,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543953681] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:04:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761862470] [2023-03-31 23:04:24,578 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-03-31 23:04:24,578 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:04:24,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:04:24,578 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:04:24,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:04:25,213 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 26 for LOIs [2023-03-31 23:04:25,242 INFO L197 IcfgInterpreter]: Interpreting procedure do_discover_list with input of size 75 for LOIs [2023-03-31 23:04:26,769 INFO L197 IcfgInterpreter]: Interpreting procedure dStrHex with input of size 40 for LOIs [2023-03-31 23:04:26,906 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2023-03-31 23:04:26,930 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 30 for LOIs [2023-03-31 23:04:26,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-03-31 23:04:27,171 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:04:36,883 WARN L223 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 286 DAG size of output: 278 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:04:54,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1158#(and (= ~__tmpTR__int_1~0 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |~#smp_def_rrlen_arr~0.offset| 0) (= |#NULL.offset| 0) (= |~#smp_def_rrlen_arr~0.base| 12) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (exists ((|v_dStrHex_~#buff~0.base_BEFORE_CALL_7| Int) (|v_#memory_int_431| (Array Int (Array Int Int)))) (and (<= 0 |v_dStrHex_~#buff~0.base_BEFORE_CALL_7|) (= |#memory_int| (store |v_#memory_int_431| |v_dStrHex_~#buff~0.base_BEFORE_CALL_7| (store (select |v_#memory_int_431| |v_dStrHex_~#buff~0.base_BEFORE_CALL_7|) 80 0))))))' at error location [2023-03-31 23:04:54,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:04:54,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:04:54,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-03-31 23:04:54,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717254195] [2023-03-31 23:04:54,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:04:54,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 23:04:54,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:04:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 23:04:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1640, Unknown=3, NotChecked=0, Total=1806 [2023-03-31 23:04:54,517 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 23:04:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:04:55,700 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2023-03-31 23:04:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 23:04:55,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2023-03-31 23:04:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:04:55,702 INFO L225 Difference]: With dead ends: 123 [2023-03-31 23:04:55,702 INFO L226 Difference]: Without dead ends: 70 [2023-03-31 23:04:55,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=323, Invalid=2754, Unknown=3, NotChecked=0, Total=3080 [2023-03-31 23:04:55,704 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 21 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:04:55,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 308 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 23:04:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-03-31 23:04:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-03-31 23:04:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:04:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2023-03-31 23:04:55,715 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 38 [2023-03-31 23:04:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:04:55,716 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2023-03-31 23:04:55,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 23:04:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2023-03-31 23:04:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 23:04:55,717 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:04:55,717 INFO L195 NwaCegarLoop]: trace histogram [11, 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, 1, 1, 1] [2023-03-31 23:04:55,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:04:55,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:04:55,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:04:55,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:04:55,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1585915034, now seen corresponding path program 3 times [2023-03-31 23:04:55,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:04:55,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339401487] [2023-03-31 23:04:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:04:55,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:04:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:04:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 23:04:56,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:04:56,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339401487] [2023-03-31 23:04:56,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339401487] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:04:56,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211597038] [2023-03-31 23:04:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:04:56,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:04:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:04:56,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:04:56,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:04:56,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:04:56,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:04:56,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-31 23:04:56,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:04:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 23:04:57,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:04:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 23:04:57,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211597038] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:04:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1939693055] [2023-03-31 23:04:57,919 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-03-31 23:04:57,920 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:04:57,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:04:57,920 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:04:57,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:04:58,491 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 26 for LOIs [2023-03-31 23:04:58,511 INFO L197 IcfgInterpreter]: Interpreting procedure do_discover_list with input of size 75 for LOIs