/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:34:23,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:34:23,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:34:23,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:34:23,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:34:23,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:34:23,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:34:23,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:34:23,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:34:23,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:34:23,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:34:23,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:34:23,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:34:23,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:34:23,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:34:23,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:34:23,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:34:23,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:34:23,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:34:23,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:34:23,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:34:23,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:34:23,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:34:23,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:34:23,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:34:23,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:34:23,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:34:23,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:34:23,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:34:23,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:34:23,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:34:23,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:34:23,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:34:23,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:34:23,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:34:23,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:34:23,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:34:23,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:34:23,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:34:23,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:34:23,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:34:23,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:34:23,270 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:34:23,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:34:23,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:34:23,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:34:23,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:34:23,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:34:23,272 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:34:23,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:34:23,272 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:34:23,272 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:34:23,273 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:34:23,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:34:23,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:34:23,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:34:23,273 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:34:23,273 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:34:23,273 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:34:23,273 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:34:23,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:34:23,274 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:34:23,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:34:23,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:34:23,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:34:23,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:34:23,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:34:23,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:34:23,275 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:34:23,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:34:23,275 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:34:23,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:34:23,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:34:23,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:34:23,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:34:23,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:34:23,275 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:34:23,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:34:23,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:34:23,276 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:34:23,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:34:23,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:34:23,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:34:23,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:34:23,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:34:23,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:34:23,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:34:23,476 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:34:23,477 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:34:23,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label21.c [2023-04-01 10:34:24,535 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:34:24,991 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:34:24,992 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label21.c [2023-04-01 10:34:25,028 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a467e8fbd/a06e0bee7e1a461dab874c59bfc951ff/FLAGda8cc2c9f [2023-04-01 10:34:25,042 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a467e8fbd/a06e0bee7e1a461dab874c59bfc951ff [2023-04-01 10:34:25,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:34:25,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:34:25,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:34:25,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:34:25,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:34:25,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:34:25" (1/1) ... [2023-04-01 10:34:25,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600db6fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:25, skipping insertion in model container [2023-04-01 10:34:25,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:34:25" (1/1) ... [2023-04-01 10:34:25,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:34:25,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:34:25,426 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/Problem19_label21.c[2361,2374] [2023-04-01 10:34:26,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:34:26,305 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:34:26,326 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/Problem19_label21.c[2361,2374] [2023-04-01 10:34:26,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:34:26,858 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:34:26,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26 WrapperNode [2023-04-01 10:34:26,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:34:26,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:34:26,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:34:26,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:34:26,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:26,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:26,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:26,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:27,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:27,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:27,300 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:27,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:27,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:34:27,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:34:27,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:34:27,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:34:27,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (1/1) ... [2023-04-01 10:34:27,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:34:27,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:34:27,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:34:27,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:34:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:34:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:34:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:34:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:34:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:34:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:34:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:34:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:34:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:34:27,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:34:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:34:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:34:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:34:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:34:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:34:27,511 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:34:27,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:34:33,011 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:34:46,355 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:34:46,356 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:34:46,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:34:46 BoogieIcfgContainer [2023-04-01 10:34:46,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:34:46,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:34:46,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:34:46,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:34:46,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:34:25" (1/3) ... [2023-04-01 10:34:46,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e41ea58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:34:46, skipping insertion in model container [2023-04-01 10:34:46,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:34:26" (2/3) ... [2023-04-01 10:34:46,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e41ea58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:34:46, skipping insertion in model container [2023-04-01 10:34:46,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:34:46" (3/3) ... [2023-04-01 10:34:46,384 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label21.c [2023-04-01 10:34:46,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:34:46,396 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:34:46,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:34:46,452 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;@7a6b9fc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:34:46,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:34:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:34:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:34:46,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:34:46,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:34:46,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:34:46,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:34:46,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1235721263, now seen corresponding path program 1 times [2023-04-01 10:34:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:34:46,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67606550] [2023-04-01 10:34:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:34:46,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:34:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:34:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:34:46,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:34:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67606550] [2023-04-01 10:34:46,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67606550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:34:46,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:34:46,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:34:46,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025959155] [2023-04-01 10:34:46,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:34:46,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:34:46,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:34:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:34:46,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:34:46,760 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:34:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:34:52,175 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:34:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:34:52,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:34:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:34:52,202 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:34:52,202 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:34:52,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:34:52,211 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1291 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3272 mSolverCounterSat, 1797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 5069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1797 IncrementalHoareTripleChecker+Valid, 3272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:34:52,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 251 Invalid, 5069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1797 Valid, 3272 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-04-01 10:34:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:34:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2267. [2023-04-01 10:34:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2241 states have (on average 1.892904953145917) internal successors, (4242), 2241 states have internal predecessors, (4242), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 10:34:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 4277 transitions. [2023-04-01 10:34:52,315 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 4277 transitions. Word has length 11 [2023-04-01 10:34:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:34:52,316 INFO L495 AbstractCegarLoop]: Abstraction has 2267 states and 4277 transitions. [2023-04-01 10:34:52,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:34:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 4277 transitions. [2023-04-01 10:34:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:34:52,318 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:34:52,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:34:52,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:34:52,319 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:34:52,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:34:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1961818708, now seen corresponding path program 1 times [2023-04-01 10:34:52,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:34:52,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374487954] [2023-04-01 10:34:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:34:52,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:34:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:34:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:34:52,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:34:52,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374487954] [2023-04-01 10:34:52,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374487954] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:34:52,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:34:52,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:34:52,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378381717] [2023-04-01 10:34:52,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:34:52,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:34:52,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:34:52,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:34:52,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:34:52,553 INFO L87 Difference]: Start difference. First operand 2267 states and 4277 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:34:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:34:59,779 INFO L93 Difference]: Finished difference Result 6937 states and 13090 transitions. [2023-04-01 10:34:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:34:59,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 10:34:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:34:59,794 INFO L225 Difference]: With dead ends: 6937 [2023-04-01 10:34:59,794 INFO L226 Difference]: Without dead ends: 4675 [2023-04-01 10:34:59,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:34:59,799 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 4003 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4003 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:34:59,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4003 Valid, 178 Invalid, 8533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1791 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-04-01 10:34:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2023-04-01 10:34:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 4604. [2023-04-01 10:34:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4526 states have (on average 1.5733539549270878) internal successors, (7121), 4533 states have internal predecessors, (7121), 23 states have call successors, (23), 23 states have call predecessors, (23), 54 states have return successors, (142), 47 states have call predecessors, (142), 22 states have call successors, (142) [2023-04-01 10:34:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 7286 transitions. [2023-04-01 10:34:59,910 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 7286 transitions. Word has length 21 [2023-04-01 10:34:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:34:59,910 INFO L495 AbstractCegarLoop]: Abstraction has 4604 states and 7286 transitions. [2023-04-01 10:34:59,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:34:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 7286 transitions. [2023-04-01 10:34:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 10:34:59,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:34:59,911 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] [2023-04-01 10:34:59,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:34:59,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:34:59,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:34:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1404757989, now seen corresponding path program 1 times [2023-04-01 10:34:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:34:59,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307587603] [2023-04-01 10:34:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:34:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:34:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:35:00,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:00,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307587603] [2023-04-01 10:35:00,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307587603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:00,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:00,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:00,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033985986] [2023-04-01 10:35:00,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:00,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:00,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:00,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:00,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:00,028 INFO L87 Difference]: Start difference. First operand 4604 states and 7286 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:05,979 INFO L93 Difference]: Finished difference Result 12915 states and 21078 transitions. [2023-04-01 10:35:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:35:05,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-04-01 10:35:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:06,022 INFO L225 Difference]: With dead ends: 12915 [2023-04-01 10:35:06,022 INFO L226 Difference]: Without dead ends: 8316 [2023-04-01 10:35:06,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:35:06,033 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3658 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6961 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3658 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 8145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 6961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:06,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3658 Valid, 159 Invalid, 8145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 6961 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 10:35:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8316 states. [2023-04-01 10:35:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8316 to 8220. [2023-04-01 10:35:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8220 states, 8029 states have (on average 1.5387968613775065) internal successors, (12355), 8053 states have internal predecessors, (12355), 38 states have call successors, (38), 38 states have call predecessors, (38), 152 states have return successors, (540), 128 states have call predecessors, (540), 37 states have call successors, (540) [2023-04-01 10:35:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8220 states to 8220 states and 12933 transitions. [2023-04-01 10:35:06,325 INFO L78 Accepts]: Start accepts. Automaton has 8220 states and 12933 transitions. Word has length 24 [2023-04-01 10:35:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:06,326 INFO L495 AbstractCegarLoop]: Abstraction has 8220 states and 12933 transitions. [2023-04-01 10:35:06,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 8220 states and 12933 transitions. [2023-04-01 10:35:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 10:35:06,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:06,327 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] [2023-04-01 10:35:06,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:35:06,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:06,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:06,328 INFO L85 PathProgramCache]: Analyzing trace with hash -242884785, now seen corresponding path program 1 times [2023-04-01 10:35:06,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:06,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041900275] [2023-04-01 10:35:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:06,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:35:06,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:06,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041900275] [2023-04-01 10:35:06,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041900275] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:06,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:06,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:06,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443023264] [2023-04-01 10:35:06,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:06,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:06,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:06,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:06,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:06,463 INFO L87 Difference]: Start difference. First operand 8220 states and 12933 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:13,489 INFO L93 Difference]: Finished difference Result 24580 states and 39445 transitions. [2023-04-01 10:35:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2023-04-01 10:35:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:13,592 INFO L225 Difference]: With dead ends: 24580 [2023-04-01 10:35:13,605 INFO L226 Difference]: Without dead ends: 16365 [2023-04-01 10:35:13,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:35:13,650 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 3698 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 7396 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3698 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 9101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 7396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:13,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3698 Valid, 226 Invalid, 9101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 7396 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-01 10:35:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16365 states. [2023-04-01 10:35:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16365 to 15725. [2023-04-01 10:35:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15725 states, 15162 states have (on average 1.3533175042870333) internal successors, (20519), 15262 states have internal predecessors, (20519), 68 states have call successors, (68), 68 states have call predecessors, (68), 494 states have return successors, (2106), 394 states have call predecessors, (2106), 67 states have call successors, (2106) [2023-04-01 10:35:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15725 states to 15725 states and 22693 transitions. [2023-04-01 10:35:14,299 INFO L78 Accepts]: Start accepts. Automaton has 15725 states and 22693 transitions. Word has length 41 [2023-04-01 10:35:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:14,299 INFO L495 AbstractCegarLoop]: Abstraction has 15725 states and 22693 transitions. [2023-04-01 10:35:14,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:35:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 15725 states and 22693 transitions. [2023-04-01 10:35:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 10:35:14,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:14,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 10:35:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:35:14,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:14,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:14,323 INFO L85 PathProgramCache]: Analyzing trace with hash 424174909, now seen corresponding path program 1 times [2023-04-01 10:35:14,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:14,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426559819] [2023-04-01 10:35:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:35:14,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426559819] [2023-04-01 10:35:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426559819] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:35:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661615448] [2023-04-01 10:35:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:35:14,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:35:14,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:35:14,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:35:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:14,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:35:14,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:35:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:35:14,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:35:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661615448] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:14,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:35:14,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 10:35:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517162444] [2023-04-01 10:35:14,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:14,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:14,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:35:14,738 INFO L87 Difference]: Start difference. First operand 15725 states and 22693 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:35:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:21,725 INFO L93 Difference]: Finished difference Result 47579 states and 71183 transitions. [2023-04-01 10:35:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:35:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 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 46 [2023-04-01 10:35:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:21,803 INFO L225 Difference]: With dead ends: 47579 [2023-04-01 10:35:21,804 INFO L226 Difference]: Without dead ends: 31859 [2023-04-01 10:35:21,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:35:21,829 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5990 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6259 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5990 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 6259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:21,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5990 Valid, 125 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 6259 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 10:35:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31859 states. [2023-04-01 10:35:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31859 to 26954. [2023-04-01 10:35:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26954 states, 25896 states have (on average 1.3514442384924312) internal successors, (34997), 26095 states have internal predecessors, (34997), 116 states have call successors, (116), 116 states have call predecessors, (116), 941 states have return successors, (4182), 742 states have call predecessors, (4182), 115 states have call successors, (4182) [2023-04-01 10:35:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26954 states to 26954 states and 39295 transitions. [2023-04-01 10:35:22,323 INFO L78 Accepts]: Start accepts. Automaton has 26954 states and 39295 transitions. Word has length 46 [2023-04-01 10:35:22,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:22,324 INFO L495 AbstractCegarLoop]: Abstraction has 26954 states and 39295 transitions. [2023-04-01 10:35:22,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:35:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 26954 states and 39295 transitions. [2023-04-01 10:35:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 10:35:22,326 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:22,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:35:22,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:35:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:35:22,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:22,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash 18191286, now seen corresponding path program 1 times [2023-04-01 10:35:22,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:22,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008738208] [2023-04-01 10:35:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:22,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:35:22,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:22,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008738208] [2023-04-01 10:35:22,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008738208] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:35:22,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347810805] [2023-04-01 10:35:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:22,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:35:22,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:35:22,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:35:22,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:35:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:22,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:35:22,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:35:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:35:22,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:35:22,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347810805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:22,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:35:22,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:35:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137002605] [2023-04-01 10:35:22,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:22,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:35:22,842 INFO L87 Difference]: Start difference. First operand 26954 states and 39295 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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)