/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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:05:00,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:05:00,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:05:00,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:05:00,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:05:00,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:05:00,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:05:00,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:05:00,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:05:00,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:05:00,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:05:00,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:05:00,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:05:00,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:05:00,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:05:00,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:05:00,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:05:00,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:05:00,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:05:00,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:05:00,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:05:00,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:05:00,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:05:00,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:05:00,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:05:00,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:05:00,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:05:00,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:05:00,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:05:00,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:05:00,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:05:00,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:05:00,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:05:00,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:05:00,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:05:00,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:05:00,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:05:00,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:05:00,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:05:00,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:05:00,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:05:00,288 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 22:05:00,316 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:05:00,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:05:00,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:05:00,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:05:00,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:05:00,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:05:00,319 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:05:00,319 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:05:00,319 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:05:00,319 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:05:00,320 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:05:00,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:05:00,320 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:05:00,320 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:05:00,321 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:05:00,321 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:05:00,321 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:05:00,321 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:05:00,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:05:00,322 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:05:00,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:05:00,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:05:00,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:05:00,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:05:00,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:05:00,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:05:00,323 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:05:00,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:05:00,323 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:05:00,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:05:00,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:05:00,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:05:00,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:05:00,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:05:00,324 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:05:00,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:05:00,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:05:00,325 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:05:00,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:05:00,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:05:00,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:05:00,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:05:00,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:05:00,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:05:00,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:05:00,603 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:05:00,604 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:05:00,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label45.c [2023-03-31 22:05:01,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:05:02,211 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:05:02,211 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label45.c [2023-03-31 22:05:02,249 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c55abe323/e09a0f7cfde246289e145f4a0b845c60/FLAGc8550845e [2023-03-31 22:05:02,264 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c55abe323/e09a0f7cfde246289e145f4a0b845c60 [2023-03-31 22:05:02,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:05:02,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:05:02,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:05:02,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:05:02,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:05:02,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:05:02" (1/1) ... [2023-03-31 22:05:02,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6290703a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:02, skipping insertion in model container [2023-03-31 22:05:02,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:05:02" (1/1) ... [2023-03-31 22:05:02,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:05:02,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:05:02,582 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_label45.c[1393,1406] [2023-03-31 22:05:03,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:05:03,408 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:05:03,424 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_label45.c[1393,1406] [2023-03-31 22:05:03,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:05:03,921 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:05:03,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03 WrapperNode [2023-03-31 22:05:03,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:05:03,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:05:03,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:05:03,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:05:03,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:03,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:04,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:04,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:04,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:04,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:04,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:04,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:04,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:05:04,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:05:04,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:05:04,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:05:04,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (1/1) ... [2023-03-31 22:05:04,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:05:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:05:04,414 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 22:05:04,433 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 22:05:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:05:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:05:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:05:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:05:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:05:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:05:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:05:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:05:04,449 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:05:04,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:05:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:05:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:05:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:05:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:05:04,539 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:05:04,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:05:09,532 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:05:12,212 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:05:12,212 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:05:12,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:05:12 BoogieIcfgContainer [2023-03-31 22:05:12,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:05:12,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:05:12,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:05:12,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:05:12,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:05:02" (1/3) ... [2023-03-31 22:05:12,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f11b240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:05:12, skipping insertion in model container [2023-03-31 22:05:12,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:03" (2/3) ... [2023-03-31 22:05:12,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f11b240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:05:12, skipping insertion in model container [2023-03-31 22:05:12,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:05:12" (3/3) ... [2023-03-31 22:05:12,223 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label45.c [2023-03-31 22:05:12,240 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:05:12,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:05:12,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:05:12,321 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;@41ba1e9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:05:12,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:05:12,327 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 22:05:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:05:12,333 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:12,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:05:12,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:12,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash -331433806, now seen corresponding path program 1 times [2023-03-31 22:05:12,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:12,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432757326] [2023-03-31 22:05:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:12,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:12,791 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 22:05:12,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:12,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432757326] [2023-03-31 22:05:12,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432757326] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:12,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:05:12,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:05:12,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036658799] [2023-03-31 22:05:12,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:12,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:05:12,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:05:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:05:12,825 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 22:05:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:16,358 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:05:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:05:16,370 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 22:05:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:16,389 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:05:16,390 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:05:16,396 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 22:05:16,398 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:16,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 22:05:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:05:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-03-31 22:05:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 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 22:05:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-03-31 22:05:16,505 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-03-31 22:05:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:16,505 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-03-31 22:05:16,506 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 22:05:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-03-31 22:05:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:05:16,507 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:16,507 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] [2023-03-31 22:05:16,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:05:16,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:16,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 560425776, now seen corresponding path program 1 times [2023-03-31 22:05:16,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:16,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522980360] [2023-03-31 22:05:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:16,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:16,787 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 22:05:16,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:16,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522980360] [2023-03-31 22:05:16,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522980360] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:16,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:05:16,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:05:16,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779655316] [2023-03-31 22:05:16,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:16,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:05:16,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:16,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:05:16,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:05:16,792 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 22:05:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:22,152 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-03-31 22:05:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:05:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 27 [2023-03-31 22:05:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:22,168 INFO L225 Difference]: With dead ends: 4183 [2023-03-31 22:05:22,168 INFO L226 Difference]: Without dead ends: 2819 [2023-03-31 22:05:22,173 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 22:05:22,174 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 5414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:22,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-03-31 22:05:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-03-31 22:05:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-03-31 22:05:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-03-31 22:05:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-03-31 22:05:22,282 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-03-31 22:05:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:22,282 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-03-31 22:05:22,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 22:05:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-03-31 22:05:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 22:05:22,284 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:22,284 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] [2023-03-31 22:05:22,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:05:22,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:22,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash -847493169, now seen corresponding path program 1 times [2023-03-31 22:05:22,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:22,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636009933] [2023-03-31 22:05:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:22,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:22,529 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 22:05:22,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:22,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636009933] [2023-03-31 22:05:22,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636009933] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:05:22,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422698880] [2023-03-31 22:05:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:22,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:22,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:05:22,537 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 22:05:22,560 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 22:05:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:22,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:05:22,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:05:22,750 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 22:05:22,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:05:22,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422698880] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:22,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:05:22,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:05:22,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373144408] [2023-03-31 22:05:22,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:22,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:05:22,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:05:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:05:22,757 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 22:05:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:26,733 INFO L93 Difference]: Finished difference Result 8315 states and 13249 transitions. [2023-03-31 22:05:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:05:26,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 42 [2023-03-31 22:05:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:26,760 INFO L225 Difference]: With dead ends: 8315 [2023-03-31 22:05:26,760 INFO L226 Difference]: Without dead ends: 5569 [2023-03-31 22:05:26,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 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 22:05:26,768 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2242 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2242 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 4861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:26,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2242 Valid, 74 Invalid, 4861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 3632 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-03-31 22:05:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2023-03-31 22:05:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 4881. [2023-03-31 22:05:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4881 states, 4780 states have (on average 1.401255230125523) internal successors, (6698), 4799 states have internal predecessors, (6698), 25 states have call successors, (25), 25 states have call predecessors, (25), 75 states have return successors, (310), 56 states have call predecessors, (310), 24 states have call successors, (310) [2023-03-31 22:05:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4881 states to 4881 states and 7033 transitions. [2023-03-31 22:05:26,894 INFO L78 Accepts]: Start accepts. Automaton has 4881 states and 7033 transitions. Word has length 42 [2023-03-31 22:05:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:26,894 INFO L495 AbstractCegarLoop]: Abstraction has 4881 states and 7033 transitions. [2023-03-31 22:05:26,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 22:05:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4881 states and 7033 transitions. [2023-03-31 22:05:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:05:26,896 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:26,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:05:26,903 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 22:05:27,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:27,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:27,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -276619862, now seen corresponding path program 1 times [2023-03-31 22:05:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:27,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267635726] [2023-03-31 22:05:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:05:27,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267635726] [2023-03-31 22:05:27,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267635726] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:05:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626872708] [2023-03-31 22:05:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:27,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:05:27,292 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 22:05:27,295 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 22:05:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:27,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:05:27,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:05:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:05:27,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:05:27,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626872708] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:27,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:05:27,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:05:27,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992789621] [2023-03-31 22:05:27,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:27,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:05:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:27,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:05:27,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:05:27,470 INFO L87 Difference]: Start difference. First operand 4881 states and 7033 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 22:05:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:31,989 INFO L93 Difference]: Finished difference Result 14889 states and 22206 transitions. [2023-03-31 22:05:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:05:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 45 [2023-03-31 22:05:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:32,043 INFO L225 Difference]: With dead ends: 14889 [2023-03-31 22:05:32,044 INFO L226 Difference]: Without dead ends: 10013 [2023-03-31 22:05:32,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 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 22:05:32,059 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2041 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:32,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2041 Valid, 104 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-03-31 22:05:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10013 states. [2023-03-31 22:05:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10013 to 9632. [2023-03-31 22:05:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9369 states have (on average 1.2526416906820366) internal successors, (11736), 9434 states have internal predecessors, (11736), 46 states have call successors, (46), 46 states have call predecessors, (46), 216 states have return successors, (1129), 151 states have call predecessors, (1129), 45 states have call successors, (1129) [2023-03-31 22:05:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 12911 transitions. [2023-03-31 22:05:32,333 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 12911 transitions. Word has length 45 [2023-03-31 22:05:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:32,334 INFO L495 AbstractCegarLoop]: Abstraction has 9632 states and 12911 transitions. [2023-03-31 22:05:32,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 22:05:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 12911 transitions. [2023-03-31 22:05:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:05:32,342 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:32,342 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:05:32,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:05:32,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 22:05:32,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:32,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:32,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1754264380, now seen corresponding path program 1 times [2023-03-31 22:05:32,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:32,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480332067] [2023-03-31 22:05:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:32,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 22:05:33,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:33,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480332067] [2023-03-31 22:05:33,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480332067] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:05:33,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035178422] [2023-03-31 22:05:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:33,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:33,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:05:33,613 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 22:05:33,617 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 22:05:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:33,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 22:05:33,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:05:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 22:05:33,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:05:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035178422] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:33,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:05:33,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-03-31 22:05:33,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873823712] [2023-03-31 22:05:33,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:33,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:05:33,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:33,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:05:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:05:33,998 INFO L87 Difference]: Start difference. First operand 9632 states and 12911 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 22:05:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:38,510 INFO L93 Difference]: Finished difference Result 24242 states and 32302 transitions. [2023-03-31 22:05:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:05:38,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 79 [2023-03-31 22:05:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:38,563 INFO L225 Difference]: With dead ends: 24242 [2023-03-31 22:05:38,564 INFO L226 Difference]: Without dead ends: 14615 [2023-03-31 22:05:38,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:05:38,588 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1993 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4270 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 5083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 4270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:38,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1993 Valid, 118 Invalid, 5083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 4270 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-31 22:05:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14615 states. [2023-03-31 22:05:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14615 to 14031. [2023-03-31 22:05:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14031 states, 13583 states have (on average 1.1924464404034454) internal successors, (16197), 13715 states have internal predecessors, (16197), 66 states have call successors, (66), 66 states have call predecessors, (66), 381 states have return successors, (1956), 249 states have call predecessors, (1956), 65 states have call successors, (1956) [2023-03-31 22:05:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14031 states to 14031 states and 18219 transitions. [2023-03-31 22:05:38,912 INFO L78 Accepts]: Start accepts. Automaton has 14031 states and 18219 transitions. Word has length 79 [2023-03-31 22:05:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:38,914 INFO L495 AbstractCegarLoop]: Abstraction has 14031 states and 18219 transitions. [2023-03-31 22:05:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 22:05:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14031 states and 18219 transitions. [2023-03-31 22:05:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 22:05:38,917 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:38,917 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:05:38,923 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 22:05:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:39,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:39,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash -452390874, now seen corresponding path program 1 times [2023-03-31 22:05:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:39,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115899438] [2023-03-31 22:05:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:39,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 22:05:39,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:39,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115899438] [2023-03-31 22:05:39,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115899438] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:05:39,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819906392] [2023-03-31 22:05:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:39,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:05:39,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:05:39,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:05:39,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:05:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:39,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 22:05:39,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:05:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:05:39,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:05:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:05:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819906392] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:05:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782671353] [2023-03-31 22:05:39,898 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-03-31 22:05:39,898 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:05:39,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:05:39,905 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:05:39,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:05:40,021 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:05:40,260 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59 [2023-03-31 22:05:40,701 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8550 conjuctions. This might take some time... [2023-03-31 22:05:40,800 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 15 conjuctions. [2023-03-31 22:05:42,157 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:05:45,909 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60