/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/Problem18_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:31:03,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:31:03,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:31:03,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:31:03,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:31:03,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:31:03,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:31:03,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:31:03,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:31:03,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:31:03,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:31:03,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:31:03,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:31:03,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:31:03,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:31:03,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:31:03,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:31:03,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:31:03,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:31:03,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:31:03,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:31:03,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:31:03,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:31:03,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:31:03,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:31:03,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:31:03,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:31:03,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:31:03,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:31:03,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:31:03,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:31:03,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:31:03,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:31:03,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:31:03,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:31:03,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:31:03,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:31:03,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:31:03,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:31:03,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:31:03,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:31:03,384 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 10:31:03,408 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:31:03,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:31:03,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:31:03,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:31:03,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:31:03,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:31:03,409 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:31:03,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:31:03,409 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:31:03,410 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:31:03,410 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:31:03,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:31:03,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:31:03,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:31:03,410 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:31:03,411 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:31:03,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:31:03,411 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:31:03,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:31:03,411 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:31:03,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:31:03,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:31:03,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:31:03,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:31:03,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:31:03,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:31:03,412 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:31:03,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:31:03,412 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:31:03,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:31:03,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:31:03,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:31:03,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:31:03,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:31:03,413 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:31:03,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:31:03,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:31:03,413 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:31:03,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:31:03,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:31:03,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:31:03,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:31:03,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:31:03,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:31:03,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:31:03,594 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:31:03,595 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:31:03,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label32.c [2023-04-01 10:31:04,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:31:04,964 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:31:04,965 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label32.c [2023-04-01 10:31:04,985 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800a69f25/ce15fee3ccc94377a99da2ddebb9363d/FLAG75f9fb603 [2023-04-01 10:31:04,999 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800a69f25/ce15fee3ccc94377a99da2ddebb9363d [2023-04-01 10:31:05,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:31:05,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:31:05,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:31:05,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:31:05,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:31:05,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:05,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71621b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05, skipping insertion in model container [2023-04-01 10:31:05,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:05,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:31:05,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:31:05,283 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/Problem18_label32.c[3190,3203] [2023-04-01 10:31:05,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:31:05,768 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:31:05,785 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/Problem18_label32.c[3190,3203] [2023-04-01 10:31:05,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:31:05,980 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:31:05,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05 WrapperNode [2023-04-01 10:31:05,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:31:05,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:31:05,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:31:05,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:31:05,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:05,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:06,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:06,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:06,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:06,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:06,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:06,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:06,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:31:06,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:31:06,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:31:06,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:31:06,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (1/1) ... [2023-04-01 10:31:06,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:31:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:31:06,197 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 10:31:06,206 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 10:31:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:31:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:31:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:31:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:31:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:31:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:31:06,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:31:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:31:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:31:06,219 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:31:06,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:31:06,266 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:31:06,267 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:31:08,347 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:31:14,889 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:31:14,890 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:31:14,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:31:14 BoogieIcfgContainer [2023-04-01 10:31:14,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:31:14,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:31:14,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:31:14,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:31:14,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:31:05" (1/3) ... [2023-04-01 10:31:14,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b950efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:31:14, skipping insertion in model container [2023-04-01 10:31:14,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:31:05" (2/3) ... [2023-04-01 10:31:14,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b950efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:31:14, skipping insertion in model container [2023-04-01 10:31:14,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:31:14" (3/3) ... [2023-04-01 10:31:14,898 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label32.c [2023-04-01 10:31:14,910 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:31:14,910 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:31:14,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:31:14,948 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;@515123ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:31:14,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:31:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 10:31:14,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:31:14,957 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:14,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:14,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:14,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash 314228739, now seen corresponding path program 1 times [2023-04-01 10:31:14,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:14,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434532048] [2023-04-01 10:31:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:14,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:15,231 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 10:31:15,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:15,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434532048] [2023-04-01 10:31:15,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434532048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:15,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:15,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:31:15,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551703837] [2023-04-01 10:31:15,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:15,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:31:15,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:15,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:31:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:15,264 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 10:31:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:17,162 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 10:31:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:31:17,166 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 10:31:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:17,184 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 10:31:17,184 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 10:31:17,212 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 10:31:17,215 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:17,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 10:31:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 10:31:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 10:31:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 10:31:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-04-01 10:31:17,378 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-04-01 10:31:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:17,379 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-04-01 10:31:17,380 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 10:31:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-04-01 10:31:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:31:17,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:17,381 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 10:31:17,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:31:17,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:17,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash -35972447, now seen corresponding path program 1 times [2023-04-01 10:31:17,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:17,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585522174] [2023-04-01 10:31:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:17,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:17,518 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 10:31:17,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:17,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585522174] [2023-04-01 10:31:17,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585522174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:17,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:17,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:31:17,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148308780] [2023-04-01 10:31:17,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:17,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:31:17,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:31:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:31:17,520 INFO L87 Difference]: Start difference. First operand 919 states and 1512 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 10:31:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:19,714 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-04-01 10:31:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:31:19,715 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 10:31:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:19,721 INFO L225 Difference]: With dead ends: 2781 [2023-04-01 10:31:19,721 INFO L226 Difference]: Without dead ends: 1867 [2023-04-01 10:31:19,723 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 10:31:19,724 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:19,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 10:31:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-04-01 10:31:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-04-01 10:31:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 10:31:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-04-01 10:31:19,768 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-04-01 10:31:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:19,769 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-04-01 10:31:19,769 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 10:31:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-04-01 10:31:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:31:19,769 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:19,769 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] [2023-04-01 10:31:19,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:31:19,770 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:19,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:19,770 INFO L85 PathProgramCache]: Analyzing trace with hash -568173351, now seen corresponding path program 1 times [2023-04-01 10:31:19,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:19,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145691590] [2023-04-01 10:31:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:19,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:19,840 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 10:31:19,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:19,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145691590] [2023-04-01 10:31:19,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145691590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:19,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:19,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:31:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292210797] [2023-04-01 10:31:19,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:19,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:31:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:31:19,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:31:19,842 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 10:31:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:21,850 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-04-01 10:31:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:31:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 10:31:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:21,863 INFO L225 Difference]: With dead ends: 5051 [2023-04-01 10:31:21,863 INFO L226 Difference]: Without dead ends: 3234 [2023-04-01 10:31:21,868 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 10:31:21,869 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:21,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 10:31:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-04-01 10:31:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-04-01 10:31:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-01 10:31:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-04-01 10:31:21,931 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-04-01 10:31:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:21,931 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-04-01 10:31:21,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 10:31:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-04-01 10:31:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 10:31:21,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:21,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:21,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:31:21,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:21,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash -33145634, now seen corresponding path program 1 times [2023-04-01 10:31:21,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:21,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86927023] [2023-04-01 10:31:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:22,069 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 10:31:22,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:22,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86927023] [2023-04-01 10:31:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86927023] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:22,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:22,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:31:22,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708537440] [2023-04-01 10:31:22,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:22,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:31:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:31:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:22,072 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:31:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:23,339 INFO L93 Difference]: Finished difference Result 6434 states and 9164 transitions. [2023-04-01 10:31:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:31:23,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-04-01 10:31:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:23,348 INFO L225 Difference]: With dead ends: 6434 [2023-04-01 10:31:23,348 INFO L226 Difference]: Without dead ends: 3232 [2023-04-01 10:31:23,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:23,357 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 503 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:23,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 786 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 10:31:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2023-04-01 10:31:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3207. [2023-04-01 10:31:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3651649746192893) internal successors, (4303), 3163 states have internal predecessors, (4303), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (132), 26 states have call predecessors, (132), 16 states have call successors, (132) [2023-04-01 10:31:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4452 transitions. [2023-04-01 10:31:23,410 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4452 transitions. Word has length 58 [2023-04-01 10:31:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:23,410 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4452 transitions. [2023-04-01 10:31:23,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:31:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4452 transitions. [2023-04-01 10:31:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 10:31:23,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:23,415 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:23,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:31:23,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:23,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1381989956, now seen corresponding path program 1 times [2023-04-01 10:31:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:23,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884622259] [2023-04-01 10:31:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:23,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:31:23,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:23,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884622259] [2023-04-01 10:31:23,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884622259] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:31:23,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:31:23,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:31:23,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236713853] [2023-04-01 10:31:23,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:31:23,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:31:23,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:31:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:31:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:23,582 INFO L87 Difference]: Start difference. First operand 3207 states and 4452 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:31:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:31:25,254 INFO L93 Difference]: Finished difference Result 9127 states and 12555 transitions. [2023-04-01 10:31:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:31:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-04-01 10:31:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:31:25,302 INFO L225 Difference]: With dead ends: 9127 [2023-04-01 10:31:25,302 INFO L226 Difference]: Without dead ends: 5925 [2023-04-01 10:31:25,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:31:25,313 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 451 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:31:25,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 905 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 10:31:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2023-04-01 10:31:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5866. [2023-04-01 10:31:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5778 states have (on average 1.248355832467982) internal successors, (7213), 5797 states have internal predecessors, (7213), 29 states have call successors, (29), 29 states have call predecessors, (29), 58 states have return successors, (303), 39 states have call predecessors, (303), 28 states have call successors, (303) [2023-04-01 10:31:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 7545 transitions. [2023-04-01 10:31:25,391 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 7545 transitions. Word has length 68 [2023-04-01 10:31:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:31:25,392 INFO L495 AbstractCegarLoop]: Abstraction has 5866 states and 7545 transitions. [2023-04-01 10:31:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:31:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 7545 transitions. [2023-04-01 10:31:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 10:31:25,396 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:31:25,396 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:31:25,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:31:25,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:31:25,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:31:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash -497338569, now seen corresponding path program 1 times [2023-04-01 10:31:25,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:31:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672743029] [2023-04-01 10:31:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:31:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:25,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:31:25,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672743029] [2023-04-01 10:31:25,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672743029] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:31:25,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114524752] [2023-04-01 10:31:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:31:25,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:31:25,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:31:25,561 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 10:31:25,565 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 10:31:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:31:25,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:31:25,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:31:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:25,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:31:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:31:25,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114524752] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:31:25,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [142759652] [2023-04-01 10:31:25,886 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-04-01 10:31:25,886 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:31:25,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:31:25,892 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:31:25,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:31:26,039 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 10:31:26,164 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2023-04-01 10:31:28,602 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 39