/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 EqDomain -i ../sv-benchmarks/c/ldv-regression/alt_test.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:52:14,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:52:14,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:52:14,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:52:14,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:52:14,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:52:14,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:52:14,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:52:14,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:52:14,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:52:14,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:52:14,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:52:14,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:52:14,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:52:14,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:52:14,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:52:14,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:52:14,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:52:14,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:52:14,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:52:14,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:52:14,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:52:14,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:52:14,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:52:14,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:52:14,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:52:14,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:52:14,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:52:14,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:52:14,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:52:14,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:52:14,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:52:14,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:52:14,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:52:14,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:52:14,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:52:14,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:52:14,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:52:14,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:52:14,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:52:14,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:52:14,595 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 10:52:14,618 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:52:14,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:52:14,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:52:14,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:52:14,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:52:14,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:52:14,619 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:52:14,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:52:14,620 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:52:14,620 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:52:14,620 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:52:14,620 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:52:14,620 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:52:14,620 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:52:14,621 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:52:14,621 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:52:14,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:52:14,621 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:52:14,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:52:14,621 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:52:14,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:52:14,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:52:14,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:52:14,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:52:14,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:52:14,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:52:14,623 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:52:14,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:52:14,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:52:14,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:52:14,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:52:14,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:52:14,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:52:14,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:52:14,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:52:14,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:52:14,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:52:14,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:52:14,843 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:52:14,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/alt_test.i [2023-04-01 10:52:15,821 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:52:16,007 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:52:16,008 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/alt_test.i [2023-04-01 10:52:16,014 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7c8b480/588931ad21bb484abf7cce09e94511f5/FLAG94434a3e2 [2023-04-01 10:52:16,024 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7c8b480/588931ad21bb484abf7cce09e94511f5 [2023-04-01 10:52:16,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:52:16,026 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:52:16,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:52:16,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:52:16,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:52:16,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4717dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16, skipping insertion in model container [2023-04-01 10:52:16,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:52:16,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:52:16,183 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/ldv-regression/alt_test.i[22285,22298] [2023-04-01 10:52:16,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:52:16,196 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:52:16,217 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/ldv-regression/alt_test.i[22285,22298] [2023-04-01 10:52:16,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:52:16,236 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:52:16,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16 WrapperNode [2023-04-01 10:52:16,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:52:16,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:52:16,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:52:16,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:52:16,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,269 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:52:16,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:52:16,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:52:16,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:52:16,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (1/1) ... [2023-04-01 10:52:16,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:52:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:52:16,329 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 10:52:16,335 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 10:52:16,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:52:16,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:52:16,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:52:16,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:52:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:52:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2023-04-01 10:52:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2023-04-01 10:52:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2023-04-01 10:52:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2023-04-01 10:52:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:52:16,375 INFO L138 BoogieDeclarations]: Found implementation of procedure l_malloc [2023-04-01 10:52:16,376 INFO L138 BoogieDeclarations]: Found implementation of procedure l_free [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:52:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:52:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:52:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:52:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:52:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2023-04-01 10:52:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2023-04-01 10:52:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2023-04-01 10:52:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:52:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:52:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:52:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:52:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:52:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:52:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:52:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:52:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:52:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:52:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:52:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:52:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:52:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:52:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:52:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:52:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:52:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:52:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:52:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:52:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:52:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:52:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:52:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:52:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:52:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:52:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:52:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:52:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:52:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:52:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:52:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:52:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:52:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:52:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:52:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:52:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:52:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:52:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure l_malloc [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure l_free [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:52:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:52:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:52:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:52:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:52:16,602 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:52:16,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:52:16,678 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:52:16,699 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:52:16,699 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 10:52:16,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:52:16 BoogieIcfgContainer [2023-04-01 10:52:16,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:52:16,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:52:16,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:52:16,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:52:16,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:52:16" (1/3) ... [2023-04-01 10:52:16,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fd07a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:52:16, skipping insertion in model container [2023-04-01 10:52:16,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:52:16" (2/3) ... [2023-04-01 10:52:16,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fd07a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:52:16, skipping insertion in model container [2023-04-01 10:52:16,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:52:16" (3/3) ... [2023-04-01 10:52:16,707 INFO L112 eAbstractionObserver]: Analyzing ICFG alt_test.i [2023-04-01 10:52:16,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:52:16,719 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:52:16,751 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:52:16,756 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;@3436b3d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:52:16,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:52:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:52:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 10:52:16,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:52:16,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:52:16,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:52:16,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:52:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1937885835, now seen corresponding path program 1 times [2023-04-01 10:52:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:52:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466681508] [2023-04-01 10:52:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:52:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:52:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:52:17,068 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 10:52:17,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:52:17,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466681508] [2023-04-01 10:52:17,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466681508] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:52:17,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:52:17,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:52:17,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682252122] [2023-04-01 10:52:17,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:52:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:52:17,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:52:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:52:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:52:17,102 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:52:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:52:17,137 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-04-01 10:52:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:52:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 10:52:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:52:17,144 INFO L225 Difference]: With dead ends: 41 [2023-04-01 10:52:17,144 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 10:52:17,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:52:17,150 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:52:17,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:52:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 10:52:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 10:52:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:52:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 10:52:17,179 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2023-04-01 10:52:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:52:17,180 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 10:52:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:52:17,180 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 10:52:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 10:52:17,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:52:17,181 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:52:17,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:52:17,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:52:17,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:52:17,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1616768565, now seen corresponding path program 1 times [2023-04-01 10:52:17,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:52:17,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159262572] [2023-04-01 10:52:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:52:17,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:52:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:52:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:52:17,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:52:17,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159262572] [2023-04-01 10:52:17,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159262572] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:52:17,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:52:17,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 10:52:17,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638611597] [2023-04-01 10:52:17,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:52:17,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 10:52:17,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:52:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 10:52:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:52:17,311 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:52:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:52:17,356 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2023-04-01 10:52:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:52:17,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-04-01 10:52:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:52:17,357 INFO L225 Difference]: With dead ends: 33 [2023-04-01 10:52:17,358 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 10:52:17,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:52:17,359 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:52:17,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 62 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:52:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 10:52:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 10:52:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:52:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-04-01 10:52:17,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2023-04-01 10:52:17,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:52:17,363 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-04-01 10:52:17,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:52:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-04-01 10:52:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:52:17,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:52:17,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:52:17,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:52:17,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:52:17,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:52:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1291193007, now seen corresponding path program 1 times [2023-04-01 10:52:17,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:52:17,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186601373] [2023-04-01 10:52:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:52:17,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:52:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 10:52:17,394 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 10:52:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 10:52:17,425 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 10:52:17,425 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 10:52:17,426 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 10:52:17,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:52:17,429 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-01 10:52:17,432 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 10:52:17,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 10:52:17 BoogieIcfgContainer [2023-04-01 10:52:17,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 10:52:17,449 INFO L158 Benchmark]: Toolchain (without parser) took 1422.46ms. Allocated memory was 211.8MB in the beginning and 254.8MB in the end (delta: 43.0MB). Free memory was 149.3MB in the beginning and 152.5MB in the end (delta: -3.2MB). Peak memory consumption was 40.4MB. Max. memory is 8.0GB. [2023-04-01 10:52:17,449 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 211.8MB. Free memory was 161.6MB in the beginning and 161.5MB in the end (delta: 92.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 10:52:17,450 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.45ms. Allocated memory is still 211.8MB. Free memory was 149.0MB in the beginning and 133.2MB in the end (delta: 15.8MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-04-01 10:52:17,450 INFO L158 Benchmark]: Boogie Preprocessor took 35.59ms. Allocated memory is still 211.8MB. Free memory was 133.2MB in the beginning and 130.7MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-04-01 10:52:17,450 INFO L158 Benchmark]: RCFGBuilder took 428.07ms. Allocated memory was 211.8MB in the beginning and 254.8MB in the end (delta: 43.0MB). Free memory was 130.7MB in the beginning and 206.5MB in the end (delta: -75.8MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. [2023-04-01 10:52:17,451 INFO L158 Benchmark]: TraceAbstraction took 745.79ms. Allocated memory is still 254.8MB. Free memory was 205.4MB in the beginning and 152.5MB in the end (delta: 53.0MB). Peak memory consumption was 52.4MB. Max. memory is 8.0GB. [2023-04-01 10:52:17,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 211.8MB. Free memory was 161.6MB in the beginning and 161.5MB in the end (delta: 92.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 209.45ms. Allocated memory is still 211.8MB. Free memory was 149.0MB in the beginning and 133.2MB in the end (delta: 15.8MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.59ms. Allocated memory is still 211.8MB. Free memory was 133.2MB in the beginning and 130.7MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 428.07ms. Allocated memory was 211.8MB in the beginning and 254.8MB in the end (delta: 43.0MB). Free memory was 130.7MB in the beginning and 206.5MB in the end (delta: -75.8MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. * TraceAbstraction took 745.79ms. Allocated memory is still 254.8MB. Free memory was 205.4MB in the beginning and 152.5MB in the end (delta: 53.0MB). Peak memory consumption was 52.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 516]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L518] int globalState = 0; [L523] CALL, EXPR l_malloc(sizeof(int)) VAL [\old(globalState)=0, \old(size)=4, globalState=0] [L529] void *retVal = malloc(size); [L530] COND TRUE retVal != ((void *)0) [L531] globalState=1 [L532] return retVal; [L523] RET, EXPR l_malloc(sizeof(int)) VAL [\old(argc)=50, \old(globalState)=0, argc=50, argv={52:54}, argv={52:54}, globalState=1, l_malloc(sizeof(int))={5:0}] [L523] int *a = (int*) l_malloc(sizeof(int)); [L524] CALL l_free(a) VAL [\old(globalState)=1, globalState=1, ptr={5:0}] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=1, globalState=1, ptr={5:0}, ptr={5:0}] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=1, globalState=1, ptr={5:0}, ptr={5:0}] [L536] globalState = 0 [L524] RET l_free(a) VAL [\old(argc)=50, \old(globalState)=0, a={5:0}, argc=50, argv={52:54}, argv={52:54}, globalState=0] [L525] CALL l_free(a) VAL [\old(globalState)=0, globalState=0, ptr={5:0}] [L535] COND TRUE ptr!=((void *)0) VAL [\old(globalState)=0, globalState=0, ptr={5:0}, ptr={5:0}] [L535] (globalState == 1) ? (0) : __blast_assert () VAL [\old(globalState)=0, globalState=0, ptr={5:0}, ptr={5:0}] [L535] CALL __blast_assert () VAL [\old(globalState)=0, globalState=0] [L516] reach_error() VAL [\old(globalState)=0, globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 96 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56 IncrementalHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 32 mSDtfsCounter, 56 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 60 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-01 10:52:17,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...