/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 OctagonDomain -i ../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:54:36,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:54:36,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:54:36,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:54:36,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:54:36,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:54:36,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:54:36,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:54:36,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:54:36,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:54:36,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:54:36,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:54:36,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:54:36,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:54:36,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:54:36,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:54:36,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:54:36,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:54:36,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:54:36,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:54:36,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:54:36,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:54:36,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:54:36,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:54:36,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:54:36,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:54:36,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:54:36,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:54:36,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:54:36,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:54:36,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:54:36,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:54:36,769 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:54:36,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:54:36,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:54:36,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:54:36,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:54:36,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:54:36,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:54:36,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:54:36,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:54:36,774 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 [2023-04-01 04:54:36,813 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:54:36,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:54:36,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:54:36,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:54:36,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:54:36,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:54:36,815 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:54:36,815 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:54:36,815 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:54:36,815 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:54:36,816 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:54:36,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:54:36,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:54:36,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:54:36,816 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:54:36,816 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:54:36,817 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:54:36,817 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:54:36,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:54:36,817 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:54:36,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:54:36,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:54:36,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:54:36,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:54:36,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:54:36,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:54:36,819 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:54:36,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:54:36,819 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:54:36,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:54:36,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:54:36,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:54:36,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:54:36,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:54:36,820 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:54:36,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:54:36,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:54:36,820 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:54:36,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:54:36,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:54:36,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:54:36,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:54:37,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:54:37,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:54:37,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:54:37,104 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:54:37,104 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:54:37,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2023-04-01 04:54:38,346 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:54:38,575 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:54:38,576 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2023-04-01 04:54:38,596 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/432638d96/6ceec3f0b9f54a21a08b46ed5b8b9cbd/FLAGf16a00186 [2023-04-01 04:54:38,611 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/432638d96/6ceec3f0b9f54a21a08b46ed5b8b9cbd [2023-04-01 04:54:38,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:54:38,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:54:38,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:54:38,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:54:38,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:54:38,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:54:38" (1/1) ... [2023-04-01 04:54:38,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb6ad1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:38, skipping insertion in model container [2023-04-01 04:54:38,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:54:38" (1/1) ... [2023-04-01 04:54:38,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:54:38,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:54:38,931 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/list-simple/dll2n_prepend_equal.i[24361,24374] [2023-04-01 04:54:38,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:54:38,952 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:54:39,005 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/list-simple/dll2n_prepend_equal.i[24361,24374] [2023-04-01 04:54:39,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:54:39,033 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:54:39,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39 WrapperNode [2023-04-01 04:54:39,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:54:39,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:54:39,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:54:39,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:54:39,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,094 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:54:39,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:54:39,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:54:39,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:54:39,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (1/1) ... [2023-04-01 04:54:39,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:54:39,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:39,153 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) [2023-04-01 04:54:39,155 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 [2023-04-01 04:54:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:54:39,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2023-04-01 04:54:39,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:54:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:54:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:54:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:54:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:54:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:54:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:54:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:54:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:54:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:54:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:54:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:54:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:54:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:54:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:54:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:54:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:54:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:54:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:54:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:54:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:54:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:54:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:54:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:54:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:54:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:54:39,210 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:54:39,210 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:54:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:54:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:54:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:54:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:54:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:54:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:54:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:54:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:54:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 04:54:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-04-01 04:54:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:54:39,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:54:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:54:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-04-01 04:54:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2023-04-01 04:54:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:54:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:54:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2023-04-01 04:54:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:54:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:54:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 04:54:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:54:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:54:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:54:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:54:39,476 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:54:39,478 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:54:39,556 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 04:54:39,794 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:54:39,846 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:54:39,847 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 04:54:39,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:54:39 BoogieIcfgContainer [2023-04-01 04:54:39,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:54:39,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:54:39,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:54:39,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:54:39,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:54:38" (1/3) ... [2023-04-01 04:54:39,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736b8822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:54:39, skipping insertion in model container [2023-04-01 04:54:39,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:39" (2/3) ... [2023-04-01 04:54:39,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736b8822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:54:39, skipping insertion in model container [2023-04-01 04:54:39,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:54:39" (3/3) ... [2023-04-01 04:54:39,857 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2023-04-01 04:54:39,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:54:39,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:54:39,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:54:39,917 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;@a97b601, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:54:39,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:54:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:54:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:54:39,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:39,928 INFO L195 NwaCegarLoop]: 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] [2023-04-01 04:54:39,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:39,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash 314562459, now seen corresponding path program 1 times [2023-04-01 04:54:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:39,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251507151] [2023-04-01 04:54:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:40,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251507151] [2023-04-01 04:54:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251507151] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:54:40,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:54:40,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:54:40,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555080173] [2023-04-01 04:54:40,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:54:40,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:54:40,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:54:40,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:54:40,477 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 04:54:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:40,632 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-04-01 04:54:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:54:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-04-01 04:54:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:40,658 INFO L225 Difference]: With dead ends: 73 [2023-04-01 04:54:40,658 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 04:54:40,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:54:40,664 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:40,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 123 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:54:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 04:54:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-04-01 04:54:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:54:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-01 04:54:40,704 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2023-04-01 04:54:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:40,705 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-01 04:54:40,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 04:54:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-01 04:54:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 04:54:40,707 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:40,707 INFO L195 NwaCegarLoop]: 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] [2023-04-01 04:54:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:54:40,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:40,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash -694808113, now seen corresponding path program 1 times [2023-04-01 04:54:40,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:40,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639057444] [2023-04-01 04:54:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:40,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:40,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:40,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639057444] [2023-04-01 04:54:40,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639057444] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:40,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000016021] [2023-04-01 04:54:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:40,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:40,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:40,966 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) [2023-04-01 04:54:40,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:54:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:41,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 04:54:41,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:54:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:41,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:54:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:41,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000016021] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:54:41,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493347992] [2023-04-01 04:54:41,375 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 04:54:41,376 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:54:41,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:54:41,387 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:54:41,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:54:41,448 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:54:42,120 INFO L197 IcfgInterpreter]: Interpreting procedure dll_prepend with input of size 39 for LOIs [2023-04-01 04:54:42,353 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 39 for LOIs [2023-04-01 04:54:42,377 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-01 04:54:42,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:54:42,573 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:54:44,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '364#(and (= main_~data~0 1) (<= 1 |#StackHeapBarrier|) (= |main_~#s~0.offset| 0) (= main_~count~0 0) (= main_~ptr~0.base (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0)) (= main_~len~0 2) (= main_~temp~2.base (select (select |#memory_$Pointer$.base| main_~ptr~0.base) (+ main_~ptr~0.offset 4))) (not (= (select (select |#memory_int| main_~ptr~0.base) main_~ptr~0.offset) 1)) (= |#NULL.offset| 0) (or (not (= main_~ptr~0.offset 0)) (not (= main_~ptr~0.base 0))) (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) main_~ptr~0.offset) (<= (+ |#StackHeapBarrier| 1) |main_~#s~0.base|) (= (select (select |#memory_$Pointer$.offset| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) main_~temp~2.offset) (= |#NULL.base| 0))' at error location [2023-04-01 04:54:44,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:54:44,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:54:44,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-04-01 04:54:44,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341896642] [2023-04-01 04:54:44,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:54:44,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 04:54:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 04:54:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 04:54:44,552 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 12 states, 8 states have (on average 4.125) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 04:54:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:44,715 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-04-01 04:54:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:54:44,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 4.125) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) Word has length 26 [2023-04-01 04:54:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:44,717 INFO L225 Difference]: With dead ends: 50 [2023-04-01 04:54:44,717 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 04:54:44,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 04:54:44,719 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:44,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 120 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:54:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 04:54:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-04-01 04:54:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:54:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-04-01 04:54:44,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2023-04-01 04:54:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:44,725 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-04-01 04:54:44,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 4.125) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 04:54:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-04-01 04:54:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:54:44,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:44,726 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] [2023-04-01 04:54:44,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:54:44,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:44,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:44,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1787479269, now seen corresponding path program 2 times [2023-04-01 04:54:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:44,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870325816] [2023-04-01 04:54:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:54:46,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:46,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870325816] [2023-04-01 04:54:46,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870325816] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:54:46,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:54:46,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-01 04:54:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395850178] [2023-04-01 04:54:46,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:54:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 04:54:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:46,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 04:54:46,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2023-04-01 04:54:46,682 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 17 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:54:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:47,184 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-04-01 04:54:47,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 04:54:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-04-01 04:54:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:47,186 INFO L225 Difference]: With dead ends: 38 [2023-04-01 04:54:47,186 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 04:54:47,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-04-01 04:54:47,187 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:47,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 76 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 04:54:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 04:54:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-04-01 04:54:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:54:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-04-01 04:54:47,193 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2023-04-01 04:54:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:47,194 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-04-01 04:54:47,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:54:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-04-01 04:54:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:54:47,195 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:47,195 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] [2023-04-01 04:54:47,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:54:47,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:47,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1787395414, now seen corresponding path program 1 times [2023-04-01 04:54:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:47,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17075392] [2023-04-01 04:54:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 04:54:47,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:47,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17075392] [2023-04-01 04:54:47,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17075392] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:54:47,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:54:47,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 04:54:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371943534] [2023-04-01 04:54:47,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:54:47,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 04:54:47,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 04:54:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:54:47,447 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 9 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 04:54:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:47,575 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-04-01 04:54:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:54:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-04-01 04:54:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:47,577 INFO L225 Difference]: With dead ends: 36 [2023-04-01 04:54:47,577 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 04:54:47,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-04-01 04:54:47,578 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:47,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 132 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:54:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 04:54:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 04:54:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:54:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-04-01 04:54:47,583 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2023-04-01 04:54:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:47,584 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-04-01 04:54:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 04:54:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-04-01 04:54:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:54:47,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:47,585 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-04-01 04:54:47,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:54:47,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:47,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash 219386902, now seen corresponding path program 1 times [2023-04-01 04:54:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:47,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28826972] [2023-04-01 04:54:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:47,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:50,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:50,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28826972] [2023-04-01 04:54:50,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28826972] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:50,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686421235] [2023-04-01 04:54:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:50,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:50,922 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) [2023-04-01 04:54:50,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:54:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:51,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 149 conjunts are in the unsatisfiable core [2023-04-01 04:54:51,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:54:51,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:54:51,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 04:54:51,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2023-04-01 04:54:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:51,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-04-01 04:54:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:51,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-04-01 04:54:51,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:51,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 04:54:51,716 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-04-01 04:54:51,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2023-04-01 04:54:51,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2023-04-01 04:54:51,937 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:54:51,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 10 [2023-04-01 04:54:51,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3