/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/Problem13_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:04:29,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:04:29,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:04:29,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:04:29,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:04:29,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:04:29,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:04:30,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:04:30,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:04:30,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:04:30,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:04:30,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:04:30,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:04:30,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:04:30,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:04:30,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:04:30,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:04:30,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:04:30,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:04:30,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:04:30,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:04:30,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:04:30,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:04:30,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:04:30,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:04:30,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:04:30,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:04:30,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:04:30,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:04:30,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:04:30,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:04:30,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:04:30,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:04:30,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:04:30,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:04:30,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:04:30,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:04:30,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:04:30,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:04:30,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:04:30,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:04:30,051 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 22:04:30,090 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:04:30,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:04:30,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:04:30,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:04:30,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:04:30,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:04:30,092 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:04:30,092 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:04:30,092 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:04:30,092 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:04:30,093 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:04:30,093 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:04:30,093 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:04:30,093 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:04:30,093 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:04:30,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:04:30,093 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:04:30,093 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:04:30,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:04:30,094 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:04:30,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:04:30,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:04:30,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:04:30,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:04:30,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:04:30,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:04:30,095 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:04:30,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:04:30,096 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:04:30,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:04:30,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:04:30,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:04:30,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:04:30,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:04:30,097 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:04:30,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:04:30,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:04:30,097 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:04:30,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:04:30,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:04:30,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:04:30,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:04:30,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:04:30,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:04:30,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:04:30,353 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:04:30,354 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:04:30,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label38.c [2023-03-31 22:04:31,504 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:04:31,991 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:04:31,992 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label38.c [2023-03-31 22:04:32,021 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55e162b0/fcee914cb8af4ff6b2952e310e806532/FLAG71e98c322 [2023-03-31 22:04:32,037 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55e162b0/fcee914cb8af4ff6b2952e310e806532 [2023-03-31 22:04:32,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:04:32,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:04:32,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:04:32,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:04:32,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:04:32,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:04:32" (1/1) ... [2023-03-31 22:04:32,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14205c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:32, skipping insertion in model container [2023-03-31 22:04:32,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:04:32" (1/1) ... [2023-03-31 22:04:32,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:04:32,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:04:32,577 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/Problem13_label38.c[8378,8391] [2023-03-31 22:04:33,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:04:33,449 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:04:33,483 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/Problem13_label38.c[8378,8391] [2023-03-31 22:04:33,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:04:33,931 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:04:33,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33 WrapperNode [2023-03-31 22:04:33,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:04:33,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:04:33,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:04:33,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:04:33,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:33,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:34,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:34,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:34,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:34,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:34,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:34,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:34,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:04:34,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:04:34,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:04:34,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:04:34,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (1/1) ... [2023-03-31 22:04:34,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:04:34,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:04:34,269 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 22:04:34,276 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 22:04:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:04:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:04:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:04:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:04:34,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:04:34,309 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:04:34,309 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:04:34,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:04:34,309 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:04:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:04:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:04:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:04:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:04:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:04:34,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:04:34,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:04:34,396 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:04:34,398 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:04:39,185 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:04:41,815 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:04:41,815 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:04:41,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:04:41 BoogieIcfgContainer [2023-03-31 22:04:41,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:04:41,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:04:41,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:04:41,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:04:41,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:04:32" (1/3) ... [2023-03-31 22:04:41,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9e447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:04:41, skipping insertion in model container [2023-03-31 22:04:41,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:04:33" (2/3) ... [2023-03-31 22:04:41,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9e447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:04:41, skipping insertion in model container [2023-03-31 22:04:41,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:04:41" (3/3) ... [2023-03-31 22:04:41,826 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label38.c [2023-03-31 22:04:41,843 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:04:41,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:04:41,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:04:41,914 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;@20f7cf04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:04:41,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:04:41,922 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) [2023-03-31 22:04:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:04:41,929 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:41,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:04:41,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:41,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash -330926540, now seen corresponding path program 1 times [2023-03-31 22:04:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:41,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292102812] [2023-03-31 22:04:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:41,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:42,327 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 22:04:42,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:42,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292102812] [2023-03-31 22:04:42,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292102812] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:42,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:42,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:04:42,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558981283] [2023-03-31 22:04:42,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:42,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:04:42,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:04:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:04:42,370 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) [2023-03-31 22:04:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:45,972 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:04:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:04:45,974 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 22:04:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:45,995 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:04:45,995 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:04:46,000 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 22:04:46,003 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 753 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 1000 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:46,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 158 Invalid, 3031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-31 22:04:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:04:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-03-31 22:04:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.8904515173945227) internal successors, (2554), 1351 states have internal predecessors, (2554), 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) [2023-03-31 22:04:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2577 transitions. [2023-03-31 22:04:46,102 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2577 transitions. Word has length 11 [2023-03-31 22:04:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:46,102 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2577 transitions. [2023-03-31 22:04:46,103 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 22:04:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2577 transitions. [2023-03-31 22:04:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 22:04:46,104 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:46,104 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] [2023-03-31 22:04:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:04:46,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:46,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash -348988783, now seen corresponding path program 1 times [2023-03-31 22:04:46,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505218827] [2023-03-31 22:04:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:46,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:46,325 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 22:04:46,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:46,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505218827] [2023-03-31 22:04:46,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505218827] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:46,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:46,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:04:46,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767876526] [2023-03-31 22:04:46,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:46,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:46,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:46,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:46,329 INFO L87 Difference]: Start difference. First operand 1369 states and 2577 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22:04:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:50,678 INFO L93 Difference]: Finished difference Result 4151 states and 7858 transitions. [2023-03-31 22:04:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:04:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-03-31 22:04:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:50,694 INFO L225 Difference]: With dead ends: 4151 [2023-03-31 22:04:50,695 INFO L226 Difference]: Without dead ends: 2787 [2023-03-31 22:04:50,705 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 22:04:50,708 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2617 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:50,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2617 Valid, 90 Invalid, 4757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-31 22:04:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2023-03-31 22:04:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2743. [2023-03-31 22:04:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 2701 states have (on average 1.686782673084043) internal successors, (4556), 2705 states have internal predecessors, (4556), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-03-31 22:04:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 4645 transitions. [2023-03-31 22:04:50,810 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 4645 transitions. Word has length 28 [2023-03-31 22:04:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:50,811 INFO L495 AbstractCegarLoop]: Abstraction has 2743 states and 4645 transitions. [2023-03-31 22:04:50,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 22:04:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 4645 transitions. [2023-03-31 22:04:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 22:04:50,813 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:50,813 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] [2023-03-31 22:04:50,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:04:50,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:50,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:50,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2143446439, now seen corresponding path program 1 times [2023-03-31 22:04:50,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:50,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830450685] [2023-03-31 22:04:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:50,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:51,057 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 22:04:51,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:51,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830450685] [2023-03-31 22:04:51,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830450685] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:51,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:04:51,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:04:51,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803508035] [2023-03-31 22:04:51,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:51,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:51,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:51,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:04:51,060 INFO L87 Difference]: Start difference. First operand 2743 states and 4645 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 22:04:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:04:55,585 INFO L93 Difference]: Finished difference Result 8507 states and 14800 transitions. [2023-03-31 22:04:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:04:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42 [2023-03-31 22:04:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:04:55,622 INFO L225 Difference]: With dead ends: 8507 [2023-03-31 22:04:55,623 INFO L226 Difference]: Without dead ends: 5769 [2023-03-31 22:04:55,630 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 22:04:55,634 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2228 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4209 mSolverCounterSat, 1094 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2228 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 5303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1094 IncrementalHoareTripleChecker+Valid, 4209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:04:55,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2228 Valid, 124 Invalid, 5303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1094 Valid, 4209 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-03-31 22:04:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2023-03-31 22:04:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 5588. [2023-03-31 22:04:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5588 states, 5456 states have (on average 1.5003665689149561) internal successors, (8186), 5485 states have internal predecessors, (8186), 27 states have call successors, (27), 27 states have call predecessors, (27), 104 states have return successors, (444), 75 states have call predecessors, (444), 26 states have call successors, (444) [2023-03-31 22:04:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5588 states to 5588 states and 8657 transitions. [2023-03-31 22:04:55,818 INFO L78 Accepts]: Start accepts. Automaton has 5588 states and 8657 transitions. Word has length 42 [2023-03-31 22:04:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:04:55,819 INFO L495 AbstractCegarLoop]: Abstraction has 5588 states and 8657 transitions. [2023-03-31 22:04:55,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 22:04:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5588 states and 8657 transitions. [2023-03-31 22:04:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-31 22:04:55,827 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:04:55,827 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 22:04:55,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:04:55,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:04:55,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:04:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1632006053, now seen corresponding path program 1 times [2023-03-31 22:04:55,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:04:55,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84389044] [2023-03-31 22:04:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:04:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:04:56,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:04:56,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84389044] [2023-03-31 22:04:56,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84389044] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:04:56,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852997792] [2023-03-31 22:04:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:04:56,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:04:56,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:04:56,083 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 22:04:56,086 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 22:04:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:04:56,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:04:56,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:04:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:04:56,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:04:56,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852997792] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:04:56,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:04:56,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:04:56,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153613773] [2023-03-31 22:04:56,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:04:56,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:04:56,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:04:56,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:04:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:04:56,285 INFO L87 Difference]: Start difference. First operand 5588 states and 8657 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-03-31 22:05:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:00,402 INFO L93 Difference]: Finished difference Result 16864 states and 27315 transitions. [2023-03-31 22:05:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:05:00,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 57 [2023-03-31 22:05:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:00,449 INFO L225 Difference]: With dead ends: 16864 [2023-03-31 22:05:00,449 INFO L226 Difference]: Without dead ends: 11281 [2023-03-31 22:05:00,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:05:00,468 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:00,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-31 22:05:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11281 states. [2023-03-31 22:05:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11281 to 9576. [2023-03-31 22:05:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 9300 states have (on average 1.3731182795698924) internal successors, (12770), 9373 states have internal predecessors, (12770), 44 states have call successors, (44), 44 states have call predecessors, (44), 231 states have return successors, (1335), 158 states have call predecessors, (1335), 43 states have call successors, (1335) [2023-03-31 22:05:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 14149 transitions. [2023-03-31 22:05:00,731 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 14149 transitions. Word has length 57 [2023-03-31 22:05:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:00,731 INFO L495 AbstractCegarLoop]: Abstraction has 9576 states and 14149 transitions. [2023-03-31 22:05:00,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-03-31 22:05:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 14149 transitions. [2023-03-31 22:05:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 22:05:00,734 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:00,734 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] [2023-03-31 22:05:00,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:05:00,941 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 [2023-03-31 22:05:00,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:00,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash -172842833, now seen corresponding path program 1 times [2023-03-31 22:05:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:00,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723544801] [2023-03-31 22:05:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:01,228 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 22:05:01,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:01,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723544801] [2023-03-31 22:05:01,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723544801] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:01,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:05:01,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:05:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627491075] [2023-03-31 22:05:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:01,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:05:01,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:05:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:05:01,235 INFO L87 Difference]: Start difference. First operand 9576 states and 14149 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 22:05:07,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 22:05:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:07,711 INFO L93 Difference]: Finished difference Result 28975 states and 46011 transitions. [2023-03-31 22:05:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:05:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-03-31 22:05:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:07,805 INFO L225 Difference]: With dead ends: 28975 [2023-03-31 22:05:07,806 INFO L226 Difference]: Without dead ends: 19404 [2023-03-31 22:05:07,840 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 22:05:07,843 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2053 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4548 mSolverCounterSat, 757 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2053 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 5306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 4548 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:07,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2053 Valid, 116 Invalid, 5306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 4548 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2023-03-31 22:05:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19404 states. [2023-03-31 22:05:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19404 to 19142. [2023-03-31 22:05:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19142 states, 18543 states have (on average 1.361753761527261) internal successors, (25251), 18727 states have internal predecessors, (25251), 85 states have call successors, (85), 85 states have call predecessors, (85), 513 states have return successors, (4691), 329 states have call predecessors, (4691), 84 states have call successors, (4691) [2023-03-31 22:05:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19142 states to 19142 states and 30027 transitions. [2023-03-31 22:05:08,403 INFO L78 Accepts]: Start accepts. Automaton has 19142 states and 30027 transitions. Word has length 59 [2023-03-31 22:05:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:08,404 INFO L495 AbstractCegarLoop]: Abstraction has 19142 states and 30027 transitions. [2023-03-31 22:05:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 22:05:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 19142 states and 30027 transitions. [2023-03-31 22:05:08,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-31 22:05:08,406 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:08,407 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:05:08,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:05:08,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:08,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:08,408 INFO L85 PathProgramCache]: Analyzing trace with hash -965065971, now seen corresponding path program 1 times [2023-03-31 22:05:08,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:08,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977175430] [2023-03-31 22:05:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:08,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-03-31 22:05:08,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:08,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977175430] [2023-03-31 22:05:08,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977175430] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:05:08,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485303992] [2023-03-31 22:05:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:08,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:05:08,754 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) [2023-03-31 22:05:08,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:05:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:08,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:05:08,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:05:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 22:05:08,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:05:08,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485303992] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:08,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:05:08,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:05:08,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514823456] [2023-03-31 22:05:08,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:08,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:05:08,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:05:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:05:08,970 INFO L87 Difference]: Start difference. First operand 19142 states and 30027 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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) [2023-03-31 22:05:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:13,786 INFO L93 Difference]: Finished difference Result 48356 states and 79178 transitions. [2023-03-31 22:05:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:05:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 72 [2023-03-31 22:05:13,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:13,937 INFO L225 Difference]: With dead ends: 48356 [2023-03-31 22:05:13,938 INFO L226 Difference]: Without dead ends: 29219 [2023-03-31 22:05:14,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:05:14,005 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:14,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-03-31 22:05:14,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29219 states. [2023-03-31 22:05:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29219 to 28608. [2023-03-31 22:05:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28608 states, 27687 states have (on average 1.2743525842453136) internal successors, (35283), 27987 states have internal predecessors, (35283), 127 states have call successors, (127), 127 states have call predecessors, (127), 793 states have return successors, (8507), 493 states have call predecessors, (8507), 126 states have call successors, (8507) [2023-03-31 22:05:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28608 states to 28608 states and 43917 transitions. [2023-03-31 22:05:14,981 INFO L78 Accepts]: Start accepts. Automaton has 28608 states and 43917 transitions. Word has length 72 [2023-03-31 22:05:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:14,981 INFO L495 AbstractCegarLoop]: Abstraction has 28608 states and 43917 transitions. [2023-03-31 22:05:14,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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) [2023-03-31 22:05:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28608 states and 43917 transitions. [2023-03-31 22:05:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-03-31 22:05:14,983 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:14,983 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:05:14,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:05:15,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 22:05:15,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:15,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash -382715690, now seen corresponding path program 1 times [2023-03-31 22:05:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:15,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667445366] [2023-03-31 22:05:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 79 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:05:15,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:15,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667445366] [2023-03-31 22:05:15,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667445366] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:05:15,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657509902] [2023-03-31 22:05:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:15,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:15,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:05:15,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:05:15,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:05:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:15,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:05:15,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:05:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-03-31 22:05:15,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:05:15,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657509902] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:15,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:05:15,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:05:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214709491] [2023-03-31 22:05:15,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:15,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:05:15,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:05:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:05:15,673 INFO L87 Difference]: Start difference. First operand 28608 states and 43917 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:05:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:18,686 INFO L93 Difference]: Finished difference Result 58679 states and 92739 transitions. [2023-03-31 22:05:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:05:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 106 [2023-03-31 22:05:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:18,798 INFO L225 Difference]: With dead ends: 58679 [2023-03-31 22:05:18,798 INFO L226 Difference]: Without dead ends: 30076 [2023-03-31 22:05:18,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:05:18,869 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 855 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:18,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 932 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-31 22:05:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30076 states. [2023-03-31 22:05:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30076 to 29925. [2023-03-31 22:05:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29925 states, 28996 states have (on average 1.2416885087598288) internal successors, (36004), 29295 states have internal predecessors, (36004), 133 states have call successors, (133), 133 states have call predecessors, (133), 795 states have return successors, (8398), 496 states have call predecessors, (8398), 132 states have call successors, (8398) [2023-03-31 22:05:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29925 states to 29925 states and 44535 transitions. [2023-03-31 22:05:19,805 INFO L78 Accepts]: Start accepts. Automaton has 29925 states and 44535 transitions. Word has length 106 [2023-03-31 22:05:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:19,805 INFO L495 AbstractCegarLoop]: Abstraction has 29925 states and 44535 transitions. [2023-03-31 22:05:19,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:05:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 29925 states and 44535 transitions. [2023-03-31 22:05:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 22:05:19,813 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:19,813 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] [2023-03-31 22:05:19,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:05:20,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:20,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:20,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash -994189674, now seen corresponding path program 1 times [2023-03-31 22:05:20,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:20,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128444425] [2023-03-31 22:05:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:20,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:20,266 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 22:05:20,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:20,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128444425] [2023-03-31 22:05:20,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128444425] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:20,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:05:20,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:05:20,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702538757] [2023-03-31 22:05:20,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:20,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:05:20,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:05:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:05:20,269 INFO L87 Difference]: Start difference. First operand 29925 states and 44535 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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)