/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-ext3-properties/sll_of_sll_nondet_append-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:57:26,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:57:26,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:57:26,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:57:26,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:57:26,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:57:26,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:57:26,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:57:26,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:57:26,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:57:26,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:57:26,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:57:26,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:57:26,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:57:26,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:57:26,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:57:26,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:57:26,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:57:26,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:57:26,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:57:26,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:57:26,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:57:26,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:57:26,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:57:26,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:57:26,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:57:26,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:57:26,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:57:26,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:57:26,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:57:26,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:57:26,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:57:26,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:57:26,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:57:26,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:57:26,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:57:26,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:57:26,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:57:26,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:57:26,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:57:26,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:57:26,242 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 04:57:26,274 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:57:26,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:57:26,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:57:26,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:57:26,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:57:26,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:57:26,276 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:57:26,276 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:57:26,276 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:57:26,276 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:57:26,277 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:57:26,277 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:57:26,277 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:57:26,277 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:57:26,278 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:57:26,278 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:57:26,278 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:57:26,278 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:57:26,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:57:26,279 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:57:26,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:57:26,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:57:26,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:57:26,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:57:26,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:57:26,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:57:26,280 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:57:26,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:57:26,280 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:57:26,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:57:26,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:57:26,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:57:26,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:57:26,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:57:26,281 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:57:26,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:57:26,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:57:26,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:57:26,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:57:26,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:57:26,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:57:26,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:57:26,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:57:26,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:57:26,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:57:26,534 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:57:26,538 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:57:26,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2023-04-01 04:57:27,725 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:57:27,996 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:57:27,997 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2023-04-01 04:57:28,014 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304db10af/cf6503923cb341cfa4dc68f66efe81f6/FLAG20abc213c [2023-04-01 04:57:28,032 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304db10af/cf6503923cb341cfa4dc68f66efe81f6 [2023-04-01 04:57:28,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:57:28,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:57:28,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:57:28,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:57:28,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:57:28,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e87b16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28, skipping insertion in model container [2023-04-01 04:57:28,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:57:28,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:57:28,318 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-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2023-04-01 04:57:28,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:57:28,336 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:57:28,409 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-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2023-04-01 04:57:28,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:57:28,442 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:57:28,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28 WrapperNode [2023-04-01 04:57:28,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:57:28,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:57:28,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:57:28,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:57:28,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:57:28,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:57:28,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:57:28,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:57:28,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (1/1) ... [2023-04-01 04:57:28,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:57:28,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:28,583 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 04:57:28,585 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 04:57:28,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:57:28,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:57:28,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:57:28,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 04:57:28,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 04:57:28,620 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 04:57:28,620 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2023-04-01 04:57:28,621 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create_with_sublist [2023-04-01 04:57:28,621 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2023-04-01 04:57:28,621 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2023-04-01 04:57:28,621 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_hierarchical_destroy [2023-04-01 04:57:28,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:57:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:57:28,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:57:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:57:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:57:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:57:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:57:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:57:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 04:57:28,627 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 04:57:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:57:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:57:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:57:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:57:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:57:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:57:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:57:28,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:57:28,629 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:57:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:57:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:57:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:57:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:57:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:57:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:57:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:57:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:57:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:57:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:57:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:57:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:57:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:57:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:57:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:57:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:57:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:57:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:57:28,634 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:57:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:57:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:57:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:57:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:57:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:57:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:57:28,635 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:57:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:57:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:57:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:57:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:57:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:57:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:57:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:57:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:57:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:57:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:57:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:57:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:57:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:57:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:57:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:57:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:57:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:57:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:57:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:57:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:57:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:57:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:57:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:57:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:57:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:57:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:57:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:57:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:57:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:57:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:57:28,641 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 04:57:28,641 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2023-04-01 04:57:28,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:57:28,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:57:28,642 INFO L130 BoogieDeclarations]: Found specification of procedure node_create_with_sublist [2023-04-01 04:57:28,642 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2023-04-01 04:57:28,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:57:28,642 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2023-04-01 04:57:28,642 INFO L130 BoogieDeclarations]: Found specification of procedure sll_hierarchical_destroy [2023-04-01 04:57:28,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:57:28,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:57:28,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:57:28,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 04:57:28,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:57:28,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:57:28,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:57:28,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:57:28,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:57:28,911 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:57:28,913 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:57:28,934 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 04:57:29,191 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:57:29,247 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:57:29,248 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-01 04:57:29,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:57:29 BoogieIcfgContainer [2023-04-01 04:57:29,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:57:29,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:57:29,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:57:29,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:57:29,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:57:28" (1/3) ... [2023-04-01 04:57:29,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d6a6dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:57:29, skipping insertion in model container [2023-04-01 04:57:29,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:28" (2/3) ... [2023-04-01 04:57:29,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d6a6dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:57:29, skipping insertion in model container [2023-04-01 04:57:29,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:57:29" (3/3) ... [2023-04-01 04:57:29,257 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.i [2023-04-01 04:57:29,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:57:29,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:57:29,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:57:29,312 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;@130d5a7e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:57:29,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:57:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 04:57:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-04-01 04:57:29,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:29,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:29,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:29,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash 249607366, now seen corresponding path program 1 times [2023-04-01 04:57:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:29,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601241818] [2023-04-01 04:57:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:29,650 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 04:57:29,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:29,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601241818] [2023-04-01 04:57:29,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601241818] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:29,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:29,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:57:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497972818] [2023-04-01 04:57:29,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:29,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:57:29,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:29,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:57:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:57:29,698 INFO L87 Difference]: Start difference. First operand has 58 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:29,840 INFO L93 Difference]: Finished difference Result 121 states and 164 transitions. [2023-04-01 04:57:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:57:29,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-04-01 04:57:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:29,849 INFO L225 Difference]: With dead ends: 121 [2023-04-01 04:57:29,849 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 04:57:29,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:57:29,857 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:29,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 162 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:57:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 04:57:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-04-01 04:57:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:57:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-04-01 04:57:29,897 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 9 [2023-04-01 04:57:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:29,898 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-04-01 04:57:29,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:57:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-04-01 04:57:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:57:29,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:29,900 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-04-01 04:57:29,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:57:29,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:29,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:29,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1336111407, now seen corresponding path program 1 times [2023-04-01 04:57:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:29,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928134442] [2023-04-01 04:57:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:29,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:57:30,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:30,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928134442] [2023-04-01 04:57:30,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928134442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:30,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:30,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:57:30,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404704967] [2023-04-01 04:57:30,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:30,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:57:30,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:30,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:57:30,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:57:30,124 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 04:57:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:30,203 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-04-01 04:57:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:57:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2023-04-01 04:57:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:30,205 INFO L225 Difference]: With dead ends: 70 [2023-04-01 04:57:30,205 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 04:57:30,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:57:30,207 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:30,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 94 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:57:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 04:57:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2023-04-01 04:57:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:57:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-04-01 04:57:30,217 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2023-04-01 04:57:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:30,217 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-04-01 04:57:30,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 04:57:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-04-01 04:57:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 04:57:30,218 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:30,219 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:30,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:57:30,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:30,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1619512054, now seen corresponding path program 1 times [2023-04-01 04:57:30,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:30,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977635007] [2023-04-01 04:57:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:57:30,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:30,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977635007] [2023-04-01 04:57:30,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977635007] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:30,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255144588] [2023-04-01 04:57:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:30,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:30,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:30,382 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 04:57:30,384 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 04:57:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:30,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 04:57:30,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:30,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:57:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255144588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:30,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:57:30,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4] total 11 [2023-04-01 04:57:30,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908979991] [2023-04-01 04:57:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 04:57:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 04:57:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:57:30,733 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:57:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:30,925 INFO L93 Difference]: Finished difference Result 115 states and 141 transitions. [2023-04-01 04:57:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:57:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2023-04-01 04:57:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:30,928 INFO L225 Difference]: With dead ends: 115 [2023-04-01 04:57:30,929 INFO L226 Difference]: Without dead ends: 64 [2023-04-01 04:57:30,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-04-01 04:57:30,932 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 39 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:30,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 300 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:57:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-01 04:57:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2023-04-01 04:57:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:57:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-04-01 04:57:30,954 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 40 [2023-04-01 04:57:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:30,954 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-04-01 04:57:30,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:57:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-04-01 04:57:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 04:57:30,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:30,958 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:30,973 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 04:57:31,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:31,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:31,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:31,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1816740127, now seen corresponding path program 1 times [2023-04-01 04:57:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:31,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001390945] [2023-04-01 04:57:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:31,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:57:31,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001390945] [2023-04-01 04:57:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001390945] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379850372] [2023-04-01 04:57:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:31,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:31,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:31,329 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 04:57:31,332 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 04:57:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:31,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 04:57:31,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:31,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379850372] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:32,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682222235] [2023-04-01 04:57:32,065 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-01 04:57:32,065 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:32,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:32,075 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:32,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:32,141 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:57:33,197 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 68 for LOIs [2023-04-01 04:57:33,249 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 42 for LOIs [2023-04-01 04:57:33,354 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 30 for LOIs [2023-04-01 04:57:33,423 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 45 for LOIs [2023-04-01 04:57:33,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:57:33,509 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:39,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1138#(and (or (not (= (+ main_~i~0 1) 0)) (<= (+ main_~max~0 1) 0)) (= main_~count~0 0) (<= main_~i~0 main_~max~0) (not (= main_~i~0 0)) (= main_~min~0 main_~i~0))' at error location [2023-04-01 04:57:39,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:39,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:39,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 10] total 17 [2023-04-01 04:57:39,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599627066] [2023-04-01 04:57:39,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:39,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 04:57:39,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:39,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 04:57:39,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1976, Unknown=3, NotChecked=0, Total=2162 [2023-04-01 04:57:39,866 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 17 states, 14 states have (on average 4.714285714285714) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-01 04:57:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:40,137 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2023-04-01 04:57:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 04:57:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.714285714285714) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) Word has length 43 [2023-04-01 04:57:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:40,139 INFO L225 Difference]: With dead ends: 139 [2023-04-01 04:57:40,139 INFO L226 Difference]: Without dead ends: 87 [2023-04-01 04:57:40,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=217, Invalid=2432, Unknown=3, NotChecked=0, Total=2652 [2023-04-01 04:57:40,141 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 66 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:40,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 369 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:57:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-01 04:57:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2023-04-01 04:57:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:57:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-04-01 04:57:40,150 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 43 [2023-04-01 04:57:40,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:40,150 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-04-01 04:57:40,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.714285714285714) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-01 04:57:40,150 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-04-01 04:57:40,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 04:57:40,152 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:40,152 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:40,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:57:40,352 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,SelfDestructingSolverStorable3 [2023-04-01 04:57:40,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:40,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1886780834, now seen corresponding path program 2 times [2023-04-01 04:57:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:40,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152047659] [2023-04-01 04:57:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 04:57:40,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152047659] [2023-04-01 04:57:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152047659] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688288711] [2023-04-01 04:57:40,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:57:40,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:40,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:40,460 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) [2023-04-01 04:57:40,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:57:40,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 04:57:40,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:57:40,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:57:40,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 04:57:40,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 04:57:40,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688288711] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:40,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166055275] [2023-04-01 04:57:40,757 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-01 04:57:40,758 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:40,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:40,758 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:40,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:40,774 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:57:41,407 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 68 for LOIs [2023-04-01 04:57:41,445 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 42 for LOIs [2023-04-01 04:57:41,514 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 30 for LOIs [2023-04-01 04:57:41,563 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 45 for LOIs [2023-04-01 04:57:41,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:57:41,629 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:48,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1773#(and (or (not (= (+ main_~i~0 1) 0)) (<= (+ main_~max~0 1) 0)) (= main_~count~0 0) (<= main_~i~0 main_~max~0) (not (= main_~i~0 0)) (= main_~min~0 main_~i~0))' at error location [2023-04-01 04:57:48,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:48,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:48,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-04-01 04:57:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634497097] [2023-04-01 04:57:48,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:48,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 04:57:48,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 04:57:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1245, Unknown=5, NotChecked=0, Total=1406 [2023-04-01 04:57:48,836 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 04:57:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:48,910 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2023-04-01 04:57:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:57:48,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2023-04-01 04:57:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:48,912 INFO L225 Difference]: With dead ends: 104 [2023-04-01 04:57:48,912 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 04:57:48,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=156, Invalid=1245, Unknown=5, NotChecked=0, Total=1406 [2023-04-01 04:57:48,914 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:48,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:57:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 04:57:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2023-04-01 04:57:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 04:57:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2023-04-01 04:57:48,923 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 50 [2023-04-01 04:57:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:48,923 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2023-04-01 04:57:48,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 04:57:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2023-04-01 04:57:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 04:57:48,925 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:48,925 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:48,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:57:49,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:49,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:49,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash -551808410, now seen corresponding path program 3 times [2023-04-01 04:57:49,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:49,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59433942] [2023-04-01 04:57:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:49,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:49,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:49,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59433942] [2023-04-01 04:57:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59433942] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740118964] [2023-04-01 04:57:49,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:57:49,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:49,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:49,349 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) [2023-04-01 04:57:49,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:57:49,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:57:49,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:57:49,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 04:57:49,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:49,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:49,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740118964] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:49,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533150010] [2023-04-01 04:57:49,983 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-01 04:57:49,983 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:49,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:49,983 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:49,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:49,997 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:57:50,596 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 68 for LOIs [2023-04-01 04:57:50,631 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 42 for LOIs [2023-04-01 04:57:50,720 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 30 for LOIs [2023-04-01 04:57:50,772 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 45 for LOIs [2023-04-01 04:57:50,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:57:50,832 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:00,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2405#(and (or (not (= (+ main_~i~0 1) 0)) (<= (+ main_~max~0 1) 0)) (= main_~count~0 0) (<= main_~i~0 main_~max~0) (not (= main_~i~0 0)) (= main_~min~0 main_~i~0))' at error location [2023-04-01 04:58:00,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:00,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:00,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-04-01 04:58:00,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638570944] [2023-04-01 04:58:00,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:00,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 04:58:00,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:00,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 04:58:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2241, Unknown=6, NotChecked=0, Total=2450 [2023-04-01 04:58:00,328 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 20 states have internal predecessors, (66), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 04:58:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:00,618 INFO L93 Difference]: Finished difference Result 159 states and 196 transitions. [2023-04-01 04:58:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 04:58:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 20 states have internal predecessors, (66), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) Word has length 54 [2023-04-01 04:58:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:00,620 INFO L225 Difference]: With dead ends: 159 [2023-04-01 04:58:00,620 INFO L226 Difference]: Without dead ends: 91 [2023-04-01 04:58:00,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=220, Invalid=2530, Unknown=6, NotChecked=0, Total=2756 [2023-04-01 04:58:00,622 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:00,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 499 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:58:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-01 04:58:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2023-04-01 04:58:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 04:58:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2023-04-01 04:58:00,634 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 54 [2023-04-01 04:58:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:00,635 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2023-04-01 04:58:00,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 20 states have internal predecessors, (66), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 04:58:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2023-04-01 04:58:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 04:58:00,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:00,636 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:00,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:00,846 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:00,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1783725137, now seen corresponding path program 4 times [2023-04-01 04:58:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:00,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802551131] [2023-04-01 04:58:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:01,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802551131] [2023-04-01 04:58:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802551131] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877534728] [2023-04-01 04:58:01,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:58:01,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:01,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:01,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:01,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 04:58:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:01,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 04:58:01,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:01,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877534728] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:01,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313857785] [2023-04-01 04:58:01,801 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-04-01 04:58:01,801 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:01,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:01,802 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:01,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:01,823 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:58:02,411 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 68 for LOIs [2023-04-01 04:58:02,449 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 42 for LOIs [2023-04-01 04:58:02,514 INFO L197 IcfgInterpreter]: Interpreting procedure node_create_with_sublist with input of size 30 for LOIs [2023-04-01 04:58:02,560 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 45 for LOIs [2023-04-01 04:58:02,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:58:02,617 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:11,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3151#(and (or (not (= (+ main_~i~0 1) 0)) (<= (+ main_~max~0 1) 0)) (= main_~count~0 0) (<= main_~i~0 main_~max~0) (not (= main_~i~0 0)) (= main_~min~0 main_~i~0))' at error location [2023-04-01 04:58:11,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:11,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:11,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 21 [2023-04-01 04:58:11,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169644804] [2023-04-01 04:58:11,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:11,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 04:58:11,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:11,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 04:58:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2339, Unknown=3, NotChecked=0, Total=2550 [2023-04-01 04:58:11,257 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 21 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 21 states have internal predecessors, (68), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 04:58:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:11,467 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2023-04-01 04:58:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 04:58:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 21 states have internal predecessors, (68), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) Word has length 57 [2023-04-01 04:58:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:11,468 INFO L225 Difference]: With dead ends: 168 [2023-04-01 04:58:11,468 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 04:58:11,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=226, Invalid=2633, Unknown=3, NotChecked=0, Total=2862 [2023-04-01 04:58:11,470 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:11,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 419 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:58:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 04:58:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2023-04-01 04:58:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-04-01 04:58:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2023-04-01 04:58:11,479 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 57 [2023-04-01 04:58:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:11,479 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2023-04-01 04:58:11,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 21 states have internal predecessors, (68), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 04:58:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2023-04-01 04:58:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 04:58:11,481 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:11,481 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:11,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:11,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:11,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:11,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1319394874, now seen corresponding path program 5 times [2023-04-01 04:58:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:11,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909000833] [2023-04-01 04:58:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:11,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:11,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:11,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909000833] [2023-04-01 04:58:11,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909000833] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:11,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358224475] [2023-04-01 04:58:11,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:58:11,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:11,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:11,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 04:58:12,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 04:58:12,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:58:12,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 88 conjunts are in the unsatisfiable core [2023-04-01 04:58:12,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:12,173 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 04:58:12,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 04:58:12,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 04:58:12,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2023-04-01 04:58:12,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 29 treesize of output 28 [2023-04-01 04:58:12,520 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-04-01 04:58:12,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2023-04-01 04:58:12,544 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-04-01 04:58:12,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2023-04-01 04:58:12,646 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 04:58:12,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-04-01 04:58:12,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:58:12,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 66 [2023-04-01 04:58:12,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:58:12,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 51 [2023-04-01 04:58:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 04:58:13,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:14,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:58:14,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 191344 treesize of output 166768 [2023-04-01 04:58:23,675 WARN L223 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 496 DAG size of output: 573 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-01 04:58:27,262 INFO L321 Elim1Store]: treesize reduction 990, result has 44.4 percent of original size [2023-04-01 04:58:27,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 1 disjoint index pairs (out of 171 index pairs), introduced 22 new quantified variables, introduced 170 case distinctions, treesize of input 172616 treesize of output 164078