/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:29:55,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:29:55,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:29:55,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:29:55,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:29:55,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:29:55,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:29:55,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:29:55,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:29:55,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:29:55,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:29:55,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:29:55,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:29:55,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:29:55,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:29:55,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:29:55,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:29:55,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:29:55,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:29:55,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:29:55,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:29:55,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:29:55,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:29:55,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:29:55,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:29:55,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:29:55,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:29:55,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:29:55,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:29:55,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:29:55,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:29:55,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:29:55,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:29:55,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:29:55,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:29:55,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:29:55,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:29:55,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:29:55,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:29:55,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:29:55,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:29:55,192 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 04:29:55,216 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:29:55,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:29:55,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:29:55,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:29:55,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:29:55,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:29:55,218 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:29:55,218 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:29:55,218 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:29:55,218 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:29:55,218 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:29:55,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:29:55,218 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:29:55,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:29:55,219 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:29:55,219 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:29:55,219 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:29:55,219 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:29:55,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:29:55,219 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:29:55,220 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:29:55,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:29:55,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:29:55,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:29:55,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:29:55,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:29:55,221 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:29:55,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:29:55,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:29:55,221 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:29:55,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:29:55,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:29:55,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:29:55,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:29:55,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:29:55,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:29:55,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:29:55,448 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:29:55,448 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:29:55,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label06.c [2023-04-01 04:29:56,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:29:56,851 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:29:56,852 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label06.c [2023-04-01 04:29:56,891 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195265946/f989757be88d4fd2ae152ae8635b9468/FLAG2089182b0 [2023-04-01 04:29:56,907 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195265946/f989757be88d4fd2ae152ae8635b9468 [2023-04-01 04:29:56,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:29:56,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:29:56,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:29:56,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:29:56,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:29:56,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:29:56" (1/1) ... [2023-04-01 04:29:56,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221855fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:56, skipping insertion in model container [2023-04-01 04:29:56,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:29:56" (1/1) ... [2023-04-01 04:29:56,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:29:57,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:29:57,361 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_label06.c[7097,7110] [2023-04-01 04:29:58,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:29:58,234 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:29:58,261 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_label06.c[7097,7110] [2023-04-01 04:29:58,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:29:58,788 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:29:58,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58 WrapperNode [2023-04-01 04:29:58,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:29:58,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:29:58,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:29:58,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:29:58,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:58,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:58,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:58,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:59,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:59,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:59,153 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:59,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:59,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:29:59,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:29:59,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:29:59,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:29:59,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (1/1) ... [2023-04-01 04:29:59,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:29:59,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:59,239 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 04:29:59,257 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 04:29:59,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:29:59,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:29:59,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:29:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:29:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:29:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:29:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:29:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:29:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:29:59,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:29:59,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:29:59,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:29:59,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:29:59,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:29:59,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:29:59,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:29:59,271 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:29:59,271 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:29:59,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:29:59,350 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:29:59,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:30:05,183 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:30:18,309 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:30:18,310 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:30:18,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:18 BoogieIcfgContainer [2023-04-01 04:30:18,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:30:18,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:30:18,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:30:18,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:30:18,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:29:56" (1/3) ... [2023-04-01 04:30:18,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c40eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:18, skipping insertion in model container [2023-04-01 04:30:18,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:58" (2/3) ... [2023-04-01 04:30:18,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c40eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:18, skipping insertion in model container [2023-04-01 04:30:18,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:18" (3/3) ... [2023-04-01 04:30:18,319 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label06.c [2023-04-01 04:30:18,332 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:30:18,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:30:18,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:30:18,386 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;@1a32cab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:30:18,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:30:18,392 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 04:30:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:30:18,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:18,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:18,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:18,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:18,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1432417732, now seen corresponding path program 1 times [2023-04-01 04:30:18,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:18,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726783062] [2023-04-01 04:30:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:18,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:18,663 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 04:30:18,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:18,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726783062] [2023-04-01 04:30:18,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726783062] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:18,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:18,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:30:18,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622099655] [2023-04-01 04:30:18,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:18,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:30:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:30:18,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:30:18,697 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 04:30:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:23,587 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:30:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:30:23,591 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 04:30:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:23,616 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:30:23,617 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:30:23,627 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 04:30:23,629 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1191 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3809 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:23,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 259 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3809 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 04:30:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:30:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 04:30:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.8872046366473474) internal successors, (4233), 2243 states have internal predecessors, (4233), 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 04:30:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4268 transitions. [2023-04-01 04:30:23,763 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4268 transitions. Word has length 11 [2023-04-01 04:30:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:23,764 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4268 transitions. [2023-04-01 04:30:23,764 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 04:30:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4268 transitions. [2023-04-01 04:30:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:30:23,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:23,766 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 04:30:23,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:30:23,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:23,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1561900264, now seen corresponding path program 1 times [2023-04-01 04:30:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078524000] [2023-04-01 04:30:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:24,050 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 04:30:24,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:24,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078524000] [2023-04-01 04:30:24,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078524000] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:24,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:24,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542556183] [2023-04-01 04:30:24,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:24,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:24,055 INFO L87 Difference]: Start difference. First operand 2269 states and 4268 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 04:30:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:30,522 INFO L93 Difference]: Finished difference Result 6869 states and 12971 transitions. [2023-04-01 04:30:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:30,525 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 04:30:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:30,546 INFO L225 Difference]: With dead ends: 6869 [2023-04-01 04:30:30,546 INFO L226 Difference]: Without dead ends: 4605 [2023-04-01 04:30:30,554 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 04:30:30,556 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3856 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 2061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:30,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3856 Valid, 148 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2061 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-04-01 04:30:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2023-04-01 04:30:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4572. [2023-04-01 04:30:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4507 states have (on average 1.8011981362325271) internal successors, (8118), 4511 states have internal predecessors, (8118), 23 states have call successors, (23), 23 states have call predecessors, (23), 41 states have return successors, (120), 37 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 04:30:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 8261 transitions. [2023-04-01 04:30:30,663 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 8261 transitions. Word has length 25 [2023-04-01 04:30:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:30,663 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 8261 transitions. [2023-04-01 04:30:30,663 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 04:30:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 8261 transitions. [2023-04-01 04:30:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:30:30,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:30,664 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] [2023-04-01 04:30:30,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:30:30,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:30,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:30,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1255549168, now seen corresponding path program 1 times [2023-04-01 04:30:30,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:30,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953209307] [2023-04-01 04:30:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:30,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:30,779 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 04:30:30,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:30,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953209307] [2023-04-01 04:30:30,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953209307] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:30,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:30,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367948553] [2023-04-01 04:30:30,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:30,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:30,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:30,781 INFO L87 Difference]: Start difference. First operand 4572 states and 8261 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 04:30:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:37,869 INFO L93 Difference]: Finished difference Result 13013 states and 23486 transitions. [2023-04-01 04:30:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:37,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-01 04:30:37,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:37,912 INFO L225 Difference]: With dead ends: 13013 [2023-04-01 04:30:37,912 INFO L226 Difference]: Without dead ends: 8446 [2023-04-01 04:30:37,921 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 04:30:37,921 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3801 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6861 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 8600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 6861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:37,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 184 Invalid, 8600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 6861 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-01 04:30:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2023-04-01 04:30:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 8256. [2023-04-01 04:30:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8256 states, 8050 states have (on average 1.5526708074534161) internal successors, (12499), 8078 states have internal predecessors, (12499), 38 states have call successors, (38), 38 states have call predecessors, (38), 167 states have return successors, (593), 139 states have call predecessors, (593), 37 states have call successors, (593) [2023-04-01 04:30:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 13130 transitions. [2023-04-01 04:30:38,121 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 13130 transitions. Word has length 29 [2023-04-01 04:30:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:38,121 INFO L495 AbstractCegarLoop]: Abstraction has 8256 states and 13130 transitions. [2023-04-01 04:30:38,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 04:30:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 13130 transitions. [2023-04-01 04:30:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:30:38,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:38,123 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] [2023-04-01 04:30:38,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:30:38,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:38,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2130533624, now seen corresponding path program 1 times [2023-04-01 04:30:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:38,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563706439] [2023-04-01 04:30:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:38,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:38,243 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 04:30:38,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563706439] [2023-04-01 04:30:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563706439] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:38,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:38,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:38,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384843610] [2023-04-01 04:30:38,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:38,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:38,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:38,245 INFO L87 Difference]: Start difference. First operand 8256 states and 13130 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 04:30:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:44,954 INFO L93 Difference]: Finished difference Result 25277 states and 41484 transitions. [2023-04-01 04:30:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:30:44,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 33 [2023-04-01 04:30:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:45,018 INFO L225 Difference]: With dead ends: 25277 [2023-04-01 04:30:45,018 INFO L226 Difference]: Without dead ends: 17026 [2023-04-01 04:30:45,036 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 04:30:45,041 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 5996 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5996 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 7175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:45,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5996 Valid, 146 Invalid, 7175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-04-01 04:30:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17026 states. [2023-04-01 04:30:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17026 to 16791. [2023-04-01 04:30:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16791 states, 16256 states have (on average 1.4953248031496063) internal successors, (24308), 16346 states have internal predecessors, (24308), 74 states have call successors, (74), 74 states have call predecessors, (74), 460 states have return successors, (2019), 370 states have call predecessors, (2019), 73 states have call successors, (2019) [2023-04-01 04:30:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 26401 transitions. [2023-04-01 04:30:45,501 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 26401 transitions. Word has length 33 [2023-04-01 04:30:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:30:45,502 INFO L495 AbstractCegarLoop]: Abstraction has 16791 states and 26401 transitions. [2023-04-01 04:30:45,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 04:30:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 26401 transitions. [2023-04-01 04:30:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 04:30:45,509 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:45,509 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] [2023-04-01 04:30:45,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:30:45,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:45,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1435947150, now seen corresponding path program 1 times [2023-04-01 04:30:45,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:45,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944054605] [2023-04-01 04:30:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:45,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:45,705 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 04:30:45,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:45,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944054605] [2023-04-01 04:30:45,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944054605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:45,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:45,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:30:45,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52150834] [2023-04-01 04:30:45,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:45,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:30:45,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:30:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:30:45,707 INFO L87 Difference]: Start difference. First operand 16791 states and 26401 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 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 04:30:54,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []