/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/Problem02_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:17:30,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:17:30,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:17:30,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:17:30,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:17:30,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:17:30,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:17:30,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:17:30,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:17:30,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:17:30,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:17:30,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:17:30,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:17:30,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:17:30,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:17:30,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:17:30,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:17:30,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:17:30,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:17:30,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:17:30,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:17:30,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:17:30,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:17:30,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:17:30,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:17:30,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:17:30,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:17:30,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:17:30,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:17:30,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:17:30,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:17:30,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:17:30,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:17:30,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:17:30,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:17:30,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:17:30,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:17:30,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:17:30,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:17:30,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:17:30,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:17:30,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 03:17:30,316 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:17:30,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:17:30,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:17:30,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:17:30,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:17:30,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:17:30,318 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:17:30,318 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:17:30,319 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:17:30,319 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:17:30,320 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:17:30,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:17:30,320 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:17:30,320 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:17:30,320 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:17:30,320 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:17:30,321 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:17:30,321 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:17:30,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:17:30,321 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:17:30,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:17:30,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:17:30,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:17:30,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:17:30,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:17:30,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:17:30,322 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:17:30,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:17:30,322 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:17:30,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:17:30,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:17:30,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:17:30,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:17:30,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:17:30,323 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:17:30,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:17:30,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:17:30,323 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:17:30,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:17:30,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:17:30,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:17:30,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:17:30,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:17:30,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:17:30,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:17:30,601 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:17:30,603 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:17:30,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label36.c [2023-04-01 03:17:31,939 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:17:32,182 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:17:32,182 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label36.c [2023-04-01 03:17:32,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef50d47e2/06bd4d729f0f4cdf8bf05d01db2c5948/FLAG8bfe26eb2 [2023-04-01 03:17:32,224 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef50d47e2/06bd4d729f0f4cdf8bf05d01db2c5948 [2023-04-01 03:17:32,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:17:32,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:17:32,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:17:32,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:17:32,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:17:32,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47828588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32, skipping insertion in model container [2023-04-01 03:17:32,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:17:32,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:17:32,558 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/Problem02_label36.c[20425,20438] [2023-04-01 03:17:32,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:17:32,621 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:17:32,747 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/Problem02_label36.c[20425,20438] [2023-04-01 03:17:32,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:17:32,778 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:17:32,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32 WrapperNode [2023-04-01 03:17:32,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:17:32,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:17:32,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:17:32,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:17:32,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,852 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:17:32,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:17:32,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:17:32,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:17:32,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (1/1) ... [2023-04-01 03:17:32,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:17:32,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:17:32,910 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 03:17:32,931 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 03:17:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:17:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:17:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:17:32,953 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:17:32,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:17:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:17:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:17:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:17:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:17:32,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:17:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:17:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:17:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:17:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:17:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:17:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:17:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:17:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:17:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:17:33,038 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:17:33,040 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:17:33,928 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:17:34,202 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:17:34,202 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:17:34,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:17:34 BoogieIcfgContainer [2023-04-01 03:17:34,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:17:34,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:17:34,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:17:34,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:17:34,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:17:32" (1/3) ... [2023-04-01 03:17:34,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd462e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:17:34, skipping insertion in model container [2023-04-01 03:17:34,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:17:32" (2/3) ... [2023-04-01 03:17:34,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd462e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:17:34, skipping insertion in model container [2023-04-01 03:17:34,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:17:34" (3/3) ... [2023-04-01 03:17:34,214 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label36.c [2023-04-01 03:17:34,230 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:17:34,230 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:17:34,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:17:34,291 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;@24252e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:17:34,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:17:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:17:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 03:17:34,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:17:34,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:17:34,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:17:34,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:17:34,315 INFO L85 PathProgramCache]: Analyzing trace with hash -818161577, now seen corresponding path program 1 times [2023-04-01 03:17:34,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:17:34,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339196318] [2023-04-01 03:17:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:17:34,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:17:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:17:34,943 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 03:17:34,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:17:34,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339196318] [2023-04-01 03:17:34,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339196318] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:17:34,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:17:34,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:17:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927881809] [2023-04-01 03:17:34,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:17:34,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:17:34,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:17:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:17:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:17:34,989 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 03:17:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:17:35,338 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 03:17:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:17:35,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 03:17:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:17:35,349 INFO L225 Difference]: With dead ends: 273 [2023-04-01 03:17:35,349 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 03:17:35,353 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 03:17:35,356 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:17:35,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:17:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 03:17:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 03:17:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.7544910179640718) internal successors, (293), 167 states have internal predecessors, (293), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:17:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 302 transitions. [2023-04-01 03:17:35,435 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 302 transitions. Word has length 86 [2023-04-01 03:17:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:17:35,435 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 302 transitions. [2023-04-01 03:17:35,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 03:17:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 302 transitions. [2023-04-01 03:17:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 03:17:35,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:17:35,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 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 03:17:35,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:17:35,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:17:35,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:17:35,441 INFO L85 PathProgramCache]: Analyzing trace with hash 242742214, now seen corresponding path program 1 times [2023-04-01 03:17:35,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:17:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371291211] [2023-04-01 03:17:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:17:35,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:17:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:17:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:17:35,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:17:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371291211] [2023-04-01 03:17:35,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371291211] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:17:35,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:17:35,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:17:35,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902580120] [2023-04-01 03:17:35,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:17:35,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:17:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:17:35,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:17:35,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:17:35,872 INFO L87 Difference]: Start difference. First operand 175 states and 302 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 03:17:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:17:36,356 INFO L93 Difference]: Finished difference Result 539 states and 948 transitions. [2023-04-01 03:17:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:17:36,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 108 [2023-04-01 03:17:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:17:36,366 INFO L225 Difference]: With dead ends: 539 [2023-04-01 03:17:36,366 INFO L226 Difference]: Without dead ends: 369 [2023-04-01 03:17:36,374 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 03:17:36,377 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 278 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:17:36,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 98 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:17:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-04-01 03:17:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 351. [2023-04-01 03:17:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.6776119402985075) internal successors, (562), 339 states have internal predecessors, (562), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 03:17:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 589 transitions. [2023-04-01 03:17:36,424 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 589 transitions. Word has length 108 [2023-04-01 03:17:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:17:36,430 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 589 transitions. [2023-04-01 03:17:36,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 03:17:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 589 transitions. [2023-04-01 03:17:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-01 03:17:36,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:17:36,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 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 03:17:36,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:17:36,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:17:36,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:17:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash -746139626, now seen corresponding path program 1 times [2023-04-01 03:17:36,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:17:36,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416210177] [2023-04-01 03:17:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:17:36,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:17:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:17:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:17:36,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:17:36,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416210177] [2023-04-01 03:17:36,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416210177] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:17:36,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:17:36,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:17:36,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440813994] [2023-04-01 03:17:36,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:17:36,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:17:36,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:17:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:17:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:17:36,759 INFO L87 Difference]: Start difference. First operand 351 states and 589 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 03:17:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:17:36,987 INFO L93 Difference]: Finished difference Result 723 states and 1268 transitions. [2023-04-01 03:17:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 03:17:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 109 [2023-04-01 03:17:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:17:36,991 INFO L225 Difference]: With dead ends: 723 [2023-04-01 03:17:36,991 INFO L226 Difference]: Without dead ends: 377 [2023-04-01 03:17:36,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:17:36,999 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 260 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:17:37,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 24 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:17:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-04-01 03:17:37,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2023-04-01 03:17:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.4926253687315634) internal successors, (506), 347 states have internal predecessors, (506), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-04-01 03:17:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 538 transitions. [2023-04-01 03:17:37,040 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 538 transitions. Word has length 109 [2023-04-01 03:17:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:17:37,041 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 538 transitions. [2023-04-01 03:17:37,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 03:17:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 538 transitions. [2023-04-01 03:17:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 03:17:37,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:17:37,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 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 03:17:37,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:17:37,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:17:37,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:17:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1135320110, now seen corresponding path program 1 times [2023-04-01 03:17:37,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:17:37,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199629829] [2023-04-01 03:17:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:17:37,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:17:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:17:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:17:37,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:17:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199629829] [2023-04-01 03:17:37,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199629829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:17:37,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:17:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:17:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455385605] [2023-04-01 03:17:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:17:37,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:17:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:17:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:17:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:17:37,300 INFO L87 Difference]: Start difference. First operand 359 states and 538 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 03:17:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:17:37,625 INFO L93 Difference]: Finished difference Result 833 states and 1287 transitions. [2023-04-01 03:17:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:17:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 114 [2023-04-01 03:17:37,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:17:37,630 INFO L225 Difference]: With dead ends: 833 [2023-04-01 03:17:37,630 INFO L226 Difference]: Without dead ends: 479 [2023-04-01 03:17:37,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:17:37,635 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 255 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:17:37,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 44 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:17:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-04-01 03:17:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 457. [2023-04-01 03:17:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 428 states have (on average 1.4018691588785046) internal successors, (600), 443 states have internal predecessors, (600), 7 states have call successors, (7), 7 states have call predecessors, (7), 21 states have return successors, (44), 6 states have call predecessors, (44), 6 states have call successors, (44) [2023-04-01 03:17:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 651 transitions. [2023-04-01 03:17:37,666 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 651 transitions. Word has length 114 [2023-04-01 03:17:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:17:37,667 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 651 transitions. [2023-04-01 03:17:37,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 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 03:17:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 651 transitions. [2023-04-01 03:17:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 03:17:37,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:17:37,670 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 03:17:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:17:37,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:17:37,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:17:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1757777546, now seen corresponding path program 1 times [2023-04-01 03:17:37,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:17:37,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290349895] [2023-04-01 03:17:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:17:37,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:17:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:17:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:17:38,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:17:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290349895] [2023-04-01 03:17:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290349895] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:17:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822768927] [2023-04-01 03:17:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:17:38,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:17:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:17:38,437 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 03:17:38,469 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 03:17:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:17:38,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 03:17:38,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:17:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:17:38,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:17:38,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822768927] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:17:38,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:17:38,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 03:17:38,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982767408] [2023-04-01 03:17:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:17:38,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:17:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:17:38,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:17:38,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:17:38,805 INFO L87 Difference]: Start difference. First operand 457 states and 651 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 03:17:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:17:39,071 INFO L93 Difference]: Finished difference Result 1257 states and 1818 transitions. [2023-04-01 03:17:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:17:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 121 [2023-04-01 03:17:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:17:39,075 INFO L225 Difference]: With dead ends: 1257 [2023-04-01 03:17:39,075 INFO L226 Difference]: Without dead ends: 447 [2023-04-01 03:17:39,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:17:39,077 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:17:39,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:17:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-04-01 03:17:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2023-04-01 03:17:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 423 states have (on average 1.3238770685579195) internal successors, (560), 433 states have internal predecessors, (560), 7 states have call successors, (7), 7 states have call predecessors, (7), 16 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2023-04-01 03:17:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 602 transitions. [2023-04-01 03:17:39,094 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 602 transitions. Word has length 121 [2023-04-01 03:17:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:17:39,095 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 602 transitions. [2023-04-01 03:17:39,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 03:17:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 602 transitions. [2023-04-01 03:17:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 03:17:39,097 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:17:39,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:17:39,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:17:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:17:39,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:17:39,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:17:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2118842278, now seen corresponding path program 1 times [2023-04-01 03:17:39,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:17:39,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142503934] [2023-04-01 03:17:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:17:39,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:17:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:17:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:17:39,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:17:39,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142503934] [2023-04-01 03:17:39,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142503934] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:17:39,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950287119] [2023-04-01 03:17:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:17:39,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:17:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:17:39,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:17:39,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:17:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:17:39,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:17:39,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:17:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:17:40,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:17:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:17:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950287119] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:17:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567086507] [2023-04-01 03:17:40,223 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 03:17:40,223 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:17:40,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:17:40,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:17:40,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:17:40,599 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-04-01 03:17:46,341 WARN L223 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 488 DAG size of output: 489 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)