/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/eca-rers2012/Problem12_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:02:12,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:02:12,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:02:12,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:02:12,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:02:12,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:02:12,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:02:12,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:02:12,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:02:12,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:02:12,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:02:12,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:02:12,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:02:12,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:02:12,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:02:12,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:02:12,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:02:12,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:02:12,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:02:12,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:02:12,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:02:12,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:02:12,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:02:12,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:02:12,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:02:12,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:02:12,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:02:12,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:02:12,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:02:12,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:02:12,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:02:12,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:02:12,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:02:12,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:02:12,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:02:12,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:02:12,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:02:12,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:02:12,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:02:12,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:02:12,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:02:12,262 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 04:02:12,297 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:02:12,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:02:12,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:02:12,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:02:12,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:02:12,299 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:02:12,299 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:02:12,299 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:02:12,299 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:02:12,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:02:12,300 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:02:12,300 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:02:12,300 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:02:12,300 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:02:12,300 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:02:12,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:02:12,301 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:02:12,301 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:02:12,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:02:12,302 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:02:12,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:02:12,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:02:12,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:02:12,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:02:12,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:02:12,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:02:12,302 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:02:12,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:02:12,303 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:02:12,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:02:12,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:02:12,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:02:12,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:02:12,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:02:12,304 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:02:12,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:02:12,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:02:12,304 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:02:12,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:02:12,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:02:12,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:02:12,304 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:02:12,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:02:12,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:02:12,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:02:12,568 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:02:12,568 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:02:12,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label38.c [2023-04-01 04:02:13,775 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:02:14,283 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:02:14,283 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label38.c [2023-04-01 04:02:14,319 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac97b07a/3567de21ae104841b5dc271b6f9f1d4f/FLAG310efdb59 [2023-04-01 04:02:14,335 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac97b07a/3567de21ae104841b5dc271b6f9f1d4f [2023-04-01 04:02:14,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:02:14,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:02:14,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:02:14,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:02:14,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:02:14,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:02:14" (1/1) ... [2023-04-01 04:02:14,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d3fe31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:14, skipping insertion in model container [2023-04-01 04:02:14,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:02:14" (1/1) ... [2023-04-01 04:02:14,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:02:14,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:02:14,710 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/eca-rers2012/Problem12_label38.c[3304,3317] [2023-04-01 04:02:15,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:02:15,413 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:02:15,437 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/eca-rers2012/Problem12_label38.c[3304,3317] [2023-04-01 04:02:15,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:02:15,932 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:02:15,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15 WrapperNode [2023-04-01 04:02:15,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:02:15,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:02:15,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:02:15,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:02:15,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:15,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:15,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:16,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:16,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:16,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:16,146 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:16,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:16,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:02:16,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:02:16,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:02:16,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:02:16,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (1/1) ... [2023-04-01 04:02:16,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:02:16,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:16,230 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 04:02:16,254 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 04:02:16,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:02:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:02:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:02:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:02:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:02:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:02:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:02:16,271 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:02:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:02:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:02:16,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:02:16,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:02:16,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:02:16,362 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:02:16,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:02:20,301 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:02:20,956 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:02:20,956 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:02:20,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:02:20 BoogieIcfgContainer [2023-04-01 04:02:20,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:02:20,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:02:20,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:02:20,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:02:20,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:02:14" (1/3) ... [2023-04-01 04:02:20,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f1b833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:02:20, skipping insertion in model container [2023-04-01 04:02:20,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:15" (2/3) ... [2023-04-01 04:02:20,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f1b833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:02:20, skipping insertion in model container [2023-04-01 04:02:20,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:02:20" (3/3) ... [2023-04-01 04:02:20,969 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label38.c [2023-04-01 04:02:20,986 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:02:20,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:02:21,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:02:21,071 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;@46e5117f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:02:21,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:02:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:02:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:02:21,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:21,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:02:21,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:21,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash 636338177, now seen corresponding path program 1 times [2023-04-01 04:02:21,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:21,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257220475] [2023-04-01 04:02:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:21,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:21,520 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 04:02:21,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:21,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257220475] [2023-04-01 04:02:21,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257220475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:21,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:02:21,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:02:21,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595233999] [2023-04-01 04:02:21,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:21,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:02:21,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:02:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:02:21,567 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:02:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:24,770 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:02:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:02:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:02:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:24,800 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:02:24,800 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:02:24,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 04:02:24,813 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:24,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 04:02:24,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:02:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:02:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.6511111111111112) internal successors, (2229), 1350 states have internal predecessors, (2229), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:02:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-04-01 04:02:24,926 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-04-01 04:02:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:24,927 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-04-01 04:02:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:02:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-04-01 04:02:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:02:24,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:24,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:02:24,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:02:24,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:24,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2006805768, now seen corresponding path program 1 times [2023-04-01 04:02:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:24,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605798614] [2023-04-01 04:02:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:24,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:02:25,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:25,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605798614] [2023-04-01 04:02:25,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605798614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:25,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:02:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:02:25,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912816606] [2023-04-01 04:02:25,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:25,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:25,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:02:25,197 INFO L87 Difference]: Start difference. First operand 1368 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:02:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:29,758 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-04-01 04:02:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:02:29,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-04-01 04:02:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:29,777 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 04:02:29,778 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 04:02:29,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:02:29,791 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:29,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 04:02:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 04:02:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-04-01 04:02:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2714 states have (on average 1.4896831245394253) internal successors, (4043), 2718 states have internal predecessors, (4043), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 04:02:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-04-01 04:02:29,894 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-04-01 04:02:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:29,894 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-04-01 04:02:29,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:02:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-04-01 04:02:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 04:02:29,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:29,897 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:29,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:02:29,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:29,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1455322425, now seen corresponding path program 1 times [2023-04-01 04:02:29,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:29,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121133842] [2023-04-01 04:02:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:29,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:02:30,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:30,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121133842] [2023-04-01 04:02:30,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121133842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:30,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:02:30,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:02:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914340581] [2023-04-01 04:02:30,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:30,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:30,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:02:30,126 INFO L87 Difference]: Start difference. First operand 2756 states and 4120 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:02:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:33,922 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-04-01 04:02:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:02:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2023-04-01 04:02:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:33,955 INFO L225 Difference]: With dead ends: 8417 [2023-04-01 04:02:33,955 INFO L226 Difference]: Without dead ends: 5666 [2023-04-01 04:02:33,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:02:33,970 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:33,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 04:02:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-04-01 04:02:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-04-01 04:02:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5486 states have (on average 1.4279985417426175) internal successors, (7834), 5509 states have internal predecessors, (7834), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-04-01 04:02:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-04-01 04:02:34,164 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-04-01 04:02:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:34,164 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-04-01 04:02:34,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:02:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-04-01 04:02:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 04:02:34,173 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:34,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 04:02:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:02:34,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:34,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1492329572, now seen corresponding path program 1 times [2023-04-01 04:02:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:34,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349807473] [2023-04-01 04:02:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:34,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:02:34,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349807473] [2023-04-01 04:02:34,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349807473] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:02:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141450891] [2023-04-01 04:02:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:34,485 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 04:02:34,486 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 04:02:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:34,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:02:34,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:02:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:02:34,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:02:34,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141450891] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:02:34,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:02:34,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:02:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887984761] [2023-04-01 04:02:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:02:34,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:02:34,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:02:34,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:02:34,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:02:34,792 INFO L87 Difference]: Start difference. First operand 5604 states and 8159 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:02:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:02:38,848 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-04-01 04:02:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:02:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2023-04-01 04:02:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:02:38,904 INFO L225 Difference]: With dead ends: 17003 [2023-04-01 04:02:38,905 INFO L226 Difference]: Without dead ends: 11404 [2023-04-01 04:02:38,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:02:38,925 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2206 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4593 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 4593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:02:38,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2206 Valid, 92 Invalid, 5574 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [981 Valid, 4593 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 04:02:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-04-01 04:02:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-04-01 04:02:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3050494062188378) internal successors, (14396), 11099 states have internal predecessors, (14396), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-04-01 04:02:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15532 transitions. [2023-04-01 04:02:39,228 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15532 transitions. Word has length 74 [2023-04-01 04:02:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:02:39,230 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15532 transitions. [2023-04-01 04:02:39,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:02:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15532 transitions. [2023-04-01 04:02:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 04:02:39,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:02:39,234 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 04:02:39,248 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 04:02:39,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:39,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:02:39,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:02:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1395086339, now seen corresponding path program 1 times [2023-04-01 04:02:39,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:02:39,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211396994] [2023-04-01 04:02:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:39,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:02:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 04:02:39,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:02:39,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211396994] [2023-04-01 04:02:39,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211396994] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:02:39,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903369314] [2023-04-01 04:02:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:02:39,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:02:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:02:39,677 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 04:02:39,701 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 04:02:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:02:39,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:02:39,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:02:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:02:39,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:02:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 04:02:40,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903369314] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:02:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1384629624] [2023-04-01 04:02:40,172 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 04:02:40,172 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:02:40,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:02:40,179 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:02:40,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:02:40,392 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:02:40,518 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2023-04-01 04:02:40,823 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 31187 conjuctions. This might take some time... [2023-04-01 04:02:43,445 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 497 conjuctions. [2023-04-01 04:02:53,703 WARN L223 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 738 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)