/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/Problem15_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:15:39,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:15:39,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:15:39,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:15:39,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:15:39,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:15:39,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:15:39,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:15:39,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:15:39,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:15:39,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:15:39,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:15:39,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:15:39,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:15:39,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:15:39,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:15:39,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:15:39,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:15:39,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:15:39,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:15:39,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:15:39,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:15:39,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:15:39,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:15:39,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:15:39,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:15:39,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:15:39,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:15:39,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:15:39,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:15:39,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:15:39,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:15:39,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:15:39,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:15:39,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:15:39,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:15:39,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:15:39,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:15:39,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:15:39,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:15:39,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:15:39,137 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 04:15:39,156 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:15:39,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:15:39,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:15:39,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:15:39,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:15:39,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:15:39,157 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:15:39,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:15:39,158 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:15:39,158 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:15:39,158 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:15:39,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:15:39,158 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:15:39,158 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:15:39,159 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:15:39,159 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:15:39,159 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:15:39,159 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:15:39,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:15:39,160 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:15:39,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:15:39,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:15:39,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:15:39,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:15:39,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:15:39,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:15:39,161 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:15:39,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:15:39,161 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:15:39,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:15:39,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:15:39,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:15:39,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:15:39,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:15:39,162 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:15:39,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:15:39,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:15:39,162 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:15:39,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:15:39,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:15:39,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:15:39,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:15:39,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:15:39,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:15:39,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:15:39,376 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:15:39,376 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:15:39,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label45.c [2023-04-01 04:15:40,700 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:15:41,065 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:15:41,066 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label45.c [2023-04-01 04:15:41,087 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/774540948/1648ae080e004b43bfd1b406a70255ad/FLAG2e52a61e8 [2023-04-01 04:15:41,104 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/774540948/1648ae080e004b43bfd1b406a70255ad [2023-04-01 04:15:41,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:15:41,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:15:41,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:15:41,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:15:41,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:15:41,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:15:41" (1/1) ... [2023-04-01 04:15:41,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a202d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:41, skipping insertion in model container [2023-04-01 04:15:41,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:15:41" (1/1) ... [2023-04-01 04:15:41,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:15:41,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:15:41,407 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/Problem15_label45.c[3689,3702] [2023-04-01 04:15:41,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:15:41,835 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:15:41,864 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/Problem15_label45.c[3689,3702] [2023-04-01 04:15:42,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:15:42,055 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:15:42,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42 WrapperNode [2023-04-01 04:15:42,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:15:42,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:15:42,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:15:42,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:15:42,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,224 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:15:42,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:15:42,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:15:42,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:15:42,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (1/1) ... [2023-04-01 04:15:42,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:15:42,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:15:42,287 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 04:15:42,300 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 04:15:42,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:15:42,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:15:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:15:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:15:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:15:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:15:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:15:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:15:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:15:42,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:15:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:15:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:15:42,453 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:15:42,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:15:45,061 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:15:45,869 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:15:45,870 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:15:45,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:15:45 BoogieIcfgContainer [2023-04-01 04:15:45,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:15:45,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:15:45,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:15:45,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:15:45,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:15:41" (1/3) ... [2023-04-01 04:15:45,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b2bd8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:15:45, skipping insertion in model container [2023-04-01 04:15:45,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:42" (2/3) ... [2023-04-01 04:15:45,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b2bd8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:15:45, skipping insertion in model container [2023-04-01 04:15:45,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:15:45" (3/3) ... [2023-04-01 04:15:45,882 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label45.c [2023-04-01 04:15:45,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:15:45,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:15:45,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:15:45,968 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;@665d522e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:15:45,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:15:45,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:15:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:15:45,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:45,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:15:45,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:45,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:45,990 INFO L85 PathProgramCache]: Analyzing trace with hash 468029092, now seen corresponding path program 1 times [2023-04-01 04:15:45,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:45,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774470212] [2023-04-01 04:15:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:46,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:46,391 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 04:15:46,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774470212] [2023-04-01 04:15:46,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774470212] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:46,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:46,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:15:46,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332580711] [2023-04-01 04:15:46,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:46,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:15:46,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:15:46,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:15:46,428 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 04:15:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:48,614 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:15:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:15:48,619 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 04:15:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:48,632 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:15:48,632 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:15:48,639 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 04:15:48,643 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:48,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 04:15:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:15:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 04:15:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:15:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-04-01 04:15:48,709 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-04-01 04:15:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:48,709 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-04-01 04:15:48,710 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 04:15:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-04-01 04:15:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:15:48,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:48,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:15:48,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:15:48,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:48,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:48,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1669674040, now seen corresponding path program 1 times [2023-04-01 04:15:48,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:48,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305875191] [2023-04-01 04:15:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:48,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:48,896 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 04:15:48,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:48,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305875191] [2023-04-01 04:15:48,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305875191] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:48,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:48,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:15:48,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338864901] [2023-04-01 04:15:48,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:48,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:15:48,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:15:48,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:15:48,900 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:15:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:51,249 INFO L93 Difference]: Finished difference Result 1417 states and 2504 transitions. [2023-04-01 04:15:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:15:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:15:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:51,258 INFO L225 Difference]: With dead ends: 1417 [2023-04-01 04:15:51,258 INFO L226 Difference]: Without dead ends: 953 [2023-04-01 04:15:51,262 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 04:15:51,264 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 831 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:51,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 49 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 04:15:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-04-01 04:15:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 936. [2023-04-01 04:15:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 917 states have (on average 1.4841875681570338) internal successors, (1361), 920 states have internal predecessors, (1361), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 04:15:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1388 transitions. [2023-04-01 04:15:51,343 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1388 transitions. Word has length 23 [2023-04-01 04:15:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:51,344 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1388 transitions. [2023-04-01 04:15:51,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:15:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1388 transitions. [2023-04-01 04:15:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 04:15:51,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:51,345 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] [2023-04-01 04:15:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:15:51,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:51,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2029935527, now seen corresponding path program 1 times [2023-04-01 04:15:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642446724] [2023-04-01 04:15:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:51,509 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 04:15:51,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642446724] [2023-04-01 04:15:51,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642446724] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:51,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:51,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:15:51,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039565777] [2023-04-01 04:15:51,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:51,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:15:51,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:51,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:15:51,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:15:51,512 INFO L87 Difference]: Start difference. First operand 936 states and 1388 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:15:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:52,931 INFO L93 Difference]: Finished difference Result 2790 states and 4189 transitions. [2023-04-01 04:15:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:15:52,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-04-01 04:15:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:52,942 INFO L225 Difference]: With dead ends: 2790 [2023-04-01 04:15:52,942 INFO L226 Difference]: Without dead ends: 1859 [2023-04-01 04:15:52,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:15:52,946 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:52,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:15:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2023-04-01 04:15:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1658. [2023-04-01 04:15:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1629 states have (on average 1.3241252302025783) internal successors, (2157), 1634 states have internal predecessors, (2157), 12 states have call successors, (12), 12 states have call predecessors, (12), 16 states have return successors, (58), 11 states have call predecessors, (58), 11 states have call successors, (58) [2023-04-01 04:15:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2227 transitions. [2023-04-01 04:15:53,027 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2227 transitions. Word has length 32 [2023-04-01 04:15:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:53,028 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2227 transitions. [2023-04-01 04:15:53,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:15:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2227 transitions. [2023-04-01 04:15:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 04:15:53,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:53,030 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] [2023-04-01 04:15:53,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:15:53,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:53,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:53,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1883955538, now seen corresponding path program 1 times [2023-04-01 04:15:53,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:53,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794007202] [2023-04-01 04:15:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:53,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:53,208 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 04:15:53,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:53,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794007202] [2023-04-01 04:15:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794007202] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:53,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:15:53,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157528120] [2023-04-01 04:15:53,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:53,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:15:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:15:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:15:53,211 INFO L87 Difference]: Start difference. First operand 1658 states and 2227 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:15:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:55,725 INFO L93 Difference]: Finished difference Result 4298 states and 6004 transitions. [2023-04-01 04:15:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:15:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-04-01 04:15:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:55,742 INFO L225 Difference]: With dead ends: 4298 [2023-04-01 04:15:55,742 INFO L226 Difference]: Without dead ends: 2645 [2023-04-01 04:15:55,748 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 04:15:55,756 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 697 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:55,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 55 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 04:15:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2023-04-01 04:15:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2392. [2023-04-01 04:15:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2330 states have (on average 1.2725321888412018) internal successors, (2965), 2358 states have internal predecessors, (2965), 17 states have call successors, (17), 17 states have call predecessors, (17), 44 states have return successors, (140), 16 states have call predecessors, (140), 16 states have call successors, (140) [2023-04-01 04:15:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3122 transitions. [2023-04-01 04:15:55,835 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3122 transitions. Word has length 36 [2023-04-01 04:15:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:55,836 INFO L495 AbstractCegarLoop]: Abstraction has 2392 states and 3122 transitions. [2023-04-01 04:15:55,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:15:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3122 transitions. [2023-04-01 04:15:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 04:15:55,845 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:55,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:15:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:15:55,846 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:55,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 279361674, now seen corresponding path program 1 times [2023-04-01 04:15:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:55,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393833525] [2023-04-01 04:15:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:55,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:56,203 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 04:15:56,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:56,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393833525] [2023-04-01 04:15:56,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393833525] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:15:56,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:15:56,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:15:56,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194361403] [2023-04-01 04:15:56,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:15:56,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:15:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:15:56,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:15:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:15:56,206 INFO L87 Difference]: Start difference. First operand 2392 states and 3122 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:15:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:15:57,684 INFO L93 Difference]: Finished difference Result 5710 states and 7747 transitions. [2023-04-01 04:15:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:15:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-04-01 04:15:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:15:57,707 INFO L225 Difference]: With dead ends: 5710 [2023-04-01 04:15:57,708 INFO L226 Difference]: Without dead ends: 3323 [2023-04-01 04:15:57,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:15:57,722 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:15:57,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:15:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2023-04-01 04:15:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3239. [2023-04-01 04:15:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 3163 states have (on average 1.233322794815049) internal successors, (3901), 3197 states have internal predecessors, (3901), 21 states have call successors, (21), 21 states have call predecessors, (21), 54 states have return successors, (215), 20 states have call predecessors, (215), 20 states have call successors, (215) [2023-04-01 04:15:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 4137 transitions. [2023-04-01 04:15:57,868 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 4137 transitions. Word has length 152 [2023-04-01 04:15:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:15:57,870 INFO L495 AbstractCegarLoop]: Abstraction has 3239 states and 4137 transitions. [2023-04-01 04:15:57,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:15:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 4137 transitions. [2023-04-01 04:15:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-01 04:15:57,879 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:15:57,880 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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, 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, 1, 1, 1, 1, 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 04:15:57,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:15:57,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:15:57,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:15:57,882 INFO L85 PathProgramCache]: Analyzing trace with hash -267207324, now seen corresponding path program 1 times [2023-04-01 04:15:57,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:15:57,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365338210] [2023-04-01 04:15:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:15:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:15:58,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:15:58,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365338210] [2023-04-01 04:15:58,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365338210] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:15:58,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602819954] [2023-04-01 04:15:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:15:58,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:15:58,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:15:58,382 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 04:15:58,384 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 04:15:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:15:58,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:15:58,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:15:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:15:58,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:15:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:15:58,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602819954] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:15:58,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1868250421] [2023-04-01 04:15:58,908 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:15:58,908 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:15:58,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:15:58,932 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:15:58,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:15:59,172 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:15:59,564 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2023-04-01 04:16:00,746 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 37617 conjuctions. This might take some time... [2023-04-01 04:16:03,794 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 669 conjuctions. [2023-04-01 04:16:12,978 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38