/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:13:04,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:13:04,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:13:04,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:13:04,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:13:04,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:13:04,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:13:04,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:13:04,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:13:04,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:13:04,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:13:04,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:13:04,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:13:04,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:13:04,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:13:04,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:13:04,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:13:04,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:13:04,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:13:04,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:13:04,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:13:04,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:13:04,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:13:04,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:13:04,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:13:04,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:13:04,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:13:04,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:13:04,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:13:04,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:13:04,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:13:04,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:13:04,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:13:04,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:13:04,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:13:04,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:13:04,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:13:04,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:13:04,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:13:04,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:13:04,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:13:04,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:13:04,242 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:13:04,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:13:04,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:13:04,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:13:04,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:13:04,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:13:04,244 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:13:04,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:13:04,244 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:13:04,244 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:13:04,245 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:13:04,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:13:04,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:13:04,245 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:13:04,245 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:13:04,245 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:13:04,245 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:13:04,245 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:13:04,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:13:04,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:13:04,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:13:04,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:13:04,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:13:04,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:13:04,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:13:04,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:13:04,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:13:04,453 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:13:04,453 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:13:04,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label37.c [2023-03-31 22:13:05,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:13:05,846 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:13:05,846 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label37.c [2023-03-31 22:13:05,862 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e770f4f/92abc30479b146b595b7112ffb334fd2/FLAG621c4e09d [2023-03-31 22:13:05,875 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e770f4f/92abc30479b146b595b7112ffb334fd2 [2023-03-31 22:13:05,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:13:05,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:13:05,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:13:05,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:13:05,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:13:05,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:13:05" (1/1) ... [2023-03-31 22:13:05,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2298f7fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:05, skipping insertion in model container [2023-03-31 22:13:05,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:13:05" (1/1) ... [2023-03-31 22:13:05,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:13:05,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:13:06,052 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/Problem15_label37.c[2577,2590] [2023-03-31 22:13:06,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:13:06,462 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:13:06,525 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/Problem15_label37.c[2577,2590] [2023-03-31 22:13:06,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:13:06,677 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:13:06,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06 WrapperNode [2023-03-31 22:13:06,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:13:06,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:13:06,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:13:06,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:13:06,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,817 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:13:06,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:13:06,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:13:06,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:13:06,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (1/1) ... [2023-03-31 22:13:06,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:13:06,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:13:06,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:13:06,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:13:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:13:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:13:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:13:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:13:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:13:06,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:13:06,950 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:13:06,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:13:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:13:06,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:13:07,024 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:13:07,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:13:08,830 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:13:09,320 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:13:09,320 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:13:09,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:13:09 BoogieIcfgContainer [2023-03-31 22:13:09,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:13:09,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:13:09,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:13:09,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:13:09,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:13:05" (1/3) ... [2023-03-31 22:13:09,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb7dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:13:09, skipping insertion in model container [2023-03-31 22:13:09,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:13:06" (2/3) ... [2023-03-31 22:13:09,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb7dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:13:09, skipping insertion in model container [2023-03-31 22:13:09,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:13:09" (3/3) ... [2023-03-31 22:13:09,331 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label37.c [2023-03-31 22:13:09,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:13:09,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:13:09,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:13:09,392 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;@7f88c2ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:13:09,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:13:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:13:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:13:09,400 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:09,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:13:09,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:09,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:09,404 INFO L85 PathProgramCache]: Analyzing trace with hash 468026788, now seen corresponding path program 1 times [2023-03-31 22:13:09,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:09,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904968869] [2023-03-31 22:13:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:09,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:09,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:09,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904968869] [2023-03-31 22:13:09,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904968869] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:09,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:09,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:13:09,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423517228] [2023-03-31 22:13:09,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:13:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:09,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:13:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:09,617 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-03-31 22:13:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:11,078 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-03-31 22:13:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:13:11,091 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 [2023-03-31 22:13:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:11,100 INFO L225 Difference]: With dead ends: 720 [2023-03-31 22:13:11,101 INFO L226 Difference]: Without dead ends: 473 [2023-03-31 22:13:11,104 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 [2023-03-31 22:13:11,107 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:11,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:13:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-03-31 22:13:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-03-31 22:13:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-31 22:13:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-03-31 22:13:11,157 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-03-31 22:13:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:11,157 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-03-31 22:13:11,158 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) [2023-03-31 22:13:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-03-31 22:13:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 22:13:11,159 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:11,159 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] [2023-03-31 22:13:11,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:13:11,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:11,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:11,160 INFO L85 PathProgramCache]: Analyzing trace with hash -134193829, now seen corresponding path program 1 times [2023-03-31 22:13:11,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:11,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336466922] [2023-03-31 22:13:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:11,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:11,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336466922] [2023-03-31 22:13:11,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336466922] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:11,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:11,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:13:11,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791996508] [2023-03-31 22:13:11,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:11,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:13:11,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:11,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:13:11,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:13:11,328 INFO L87 Difference]: Start difference. First operand 473 states and 749 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) [2023-03-31 22:13:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:13,353 INFO L93 Difference]: Finished difference Result 1426 states and 2281 transitions. [2023-03-31 22:13:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:13:13,354 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 [2023-03-31 22:13:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:13,358 INFO L225 Difference]: With dead ends: 1426 [2023-03-31 22:13:13,359 INFO L226 Difference]: Without dead ends: 958 [2023-03-31 22:13:13,360 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 [2023-03-31 22:13:13,361 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 670 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:13,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 56 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-31 22:13:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-03-31 22:13:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 940. [2023-03-31 22:13:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.490174672489083) internal successors, (1365), 924 states have internal predecessors, (1365), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-03-31 22:13:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1405 transitions. [2023-03-31 22:13:13,413 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1405 transitions. Word has length 31 [2023-03-31 22:13:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:13,413 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1405 transitions. [2023-03-31 22:13:13,413 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) [2023-03-31 22:13:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1405 transitions. [2023-03-31 22:13:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 22:13:13,414 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:13,414 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] [2023-03-31 22:13:13,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:13:13,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:13,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash 363074515, now seen corresponding path program 1 times [2023-03-31 22:13:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:13,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536305959] [2023-03-31 22:13:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:13,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:13,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536305959] [2023-03-31 22:13:13,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536305959] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:13,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:13,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:13:13,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031288764] [2023-03-31 22:13:13,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:13,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:13:13,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:13:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:13:13,599 INFO L87 Difference]: Start difference. First operand 940 states and 1405 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-03-31 22:13:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:15,713 INFO L93 Difference]: Finished difference Result 2858 states and 4365 transitions. [2023-03-31 22:13:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:13:15,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-03-31 22:13:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:15,720 INFO L225 Difference]: With dead ends: 2858 [2023-03-31 22:13:15,720 INFO L226 Difference]: Without dead ends: 1923 [2023-03-31 22:13:15,721 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 [2023-03-31 22:13:15,722 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:15,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-31 22:13:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-03-31 22:13:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-03-31 22:13:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3409653465346534) internal successors, (2167), 1640 states have internal predecessors, (2167), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-03-31 22:13:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2262 transitions. [2023-03-31 22:13:15,760 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2262 transitions. Word has length 35 [2023-03-31 22:13:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:15,760 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2262 transitions. [2023-03-31 22:13:15,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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) [2023-03-31 22:13:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2262 transitions. [2023-03-31 22:13:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-03-31 22:13:15,764 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:15,764 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, 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, 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] [2023-03-31 22:13:15,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:13:15,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:15,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2103266626, now seen corresponding path program 1 times [2023-03-31 22:13:15,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:15,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324459619] [2023-03-31 22:13:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:15,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:13:15,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324459619] [2023-03-31 22:13:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324459619] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:13:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:13:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:13:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973335398] [2023-03-31 22:13:15,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:13:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:13:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:13:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:13:15,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:13:15,988 INFO L87 Difference]: Start difference. First operand 1666 states and 2262 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:13:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:13:17,332 INFO L93 Difference]: Finished difference Result 4256 states and 5993 transitions. [2023-03-31 22:13:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:13:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-03-31 22:13:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:13:17,342 INFO L225 Difference]: With dead ends: 4256 [2023-03-31 22:13:17,342 INFO L226 Difference]: Without dead ends: 2595 [2023-03-31 22:13:17,345 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 [2023-03-31 22:13:17,346 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:13:17,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:13:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2023-03-31 22:13:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2513. [2023-03-31 22:13:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2451 states have (on average 1.266829865361077) internal successors, (3105), 2479 states have internal predecessors, (3105), 17 states have call successors, (17), 17 states have call predecessors, (17), 44 states have return successors, (142), 16 states have call predecessors, (142), 16 states have call successors, (142) [2023-03-31 22:13:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3264 transitions. [2023-03-31 22:13:17,391 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3264 transitions. Word has length 152 [2023-03-31 22:13:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:13:17,391 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3264 transitions. [2023-03-31 22:13:17,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:13:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3264 transitions. [2023-03-31 22:13:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-03-31 22:13:17,394 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:13:17,394 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:13:17,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:13:17,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:13:17,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:13:17,395 INFO L85 PathProgramCache]: Analyzing trace with hash 500667892, now seen corresponding path program 1 times [2023-03-31 22:13:17,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:13:17,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302231092] [2023-03-31 22:13:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:17,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:13:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:13:17,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:13:17,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302231092] [2023-03-31 22:13:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302231092] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:13:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439588018] [2023-03-31 22:13:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:13:17,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:13:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:13:17,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:13:17,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:13:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:13:17,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:13:17,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:13:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:13:18,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:13:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:13:18,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439588018] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:13:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749659348] [2023-03-31 22:13:18,158 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:13:18,158 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:13:18,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:13:18,165 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:13:18,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:13:18,270 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:13:18,455 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2023-03-31 22:13:18,554 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 47 [2023-03-31 22:13:18,907 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7560 conjuctions. This might take some time... [2023-03-31 22:13:19,029 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 142 conjuctions. [2023-03-31 22:13:19,892 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:13:19,920 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2023-03-31 22:13:32,911 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 47