/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem17_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:27:06,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:27:06,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:27:06,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:27:06,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:27:06,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:27:06,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:27:06,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:27:06,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:27:06,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:27:06,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:27:06,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:27:06,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:27:06,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:27:06,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:27:06,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:27:06,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:27:06,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:27:06,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:27:06,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:27:06,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:27:06,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:27:06,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:27:06,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:27:06,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:27:06,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:27:06,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:27:06,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:27:06,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:27:06,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:27:06,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:27:06,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:27:06,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:27:06,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:27:06,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:27:06,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:27:06,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:27:06,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:27:06,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:27:06,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:27:06,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:27:06,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:27:06,245 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:27:06,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:27:06,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:27:06,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:27:06,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:27:06,247 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:27:06,247 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:27:06,247 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:27:06,247 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:27:06,247 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:27:06,248 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:27:06,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:27:06,248 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:27:06,248 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:27:06,249 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:27:06,249 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:27:06,249 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:27:06,249 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:27:06,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:27:06,250 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:27:06,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:27:06,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:27:06,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:27:06,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:27:06,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:27:06,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:27:06,251 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:27:06,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:27:06,251 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:27:06,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:27:06,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:27:06,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:27:06,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:27:06,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:27:06,252 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:27:06,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:27:06,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:27:06,253 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:27:06,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:27:06,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:27:06,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:27:06,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:27:06,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:27:06,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:27:06,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:27:06,499 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:27:06,500 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:27:06,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label40.c [2023-04-01 10:27:07,707 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:27:08,062 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:27:08,063 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label40.c [2023-04-01 10:27:08,088 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f55b3e5/8013ebf3e55d453da8ec001774ea5f56/FLAGa78786cd5 [2023-04-01 10:27:08,102 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f55b3e5/8013ebf3e55d453da8ec001774ea5f56 [2023-04-01 10:27:08,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:27:08,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:27:08,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:27:08,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:27:08,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:27:08,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:27:08" (1/1) ... [2023-04-01 10:27:08,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc4d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:08, skipping insertion in model container [2023-04-01 10:27:08,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:27:08" (1/1) ... [2023-04-01 10:27:08,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:27:08,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:27:08,368 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/Problem17_label40.c[3467,3480] [2023-04-01 10:27:08,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:27:08,895 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:27:08,921 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/Problem17_label40.c[3467,3480] [2023-04-01 10:27:09,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:27:09,155 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:27:09,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09 WrapperNode [2023-04-01 10:27:09,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:27:09,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:27:09,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:27:09,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:27:09,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:27:09,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:27:09,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:27:09,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:27:09,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (1/1) ... [2023-04-01 10:27:09,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:27:09,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:27:09,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:27:09,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:27:09,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:27:09,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:27:09,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:27:09,427 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:27:09,427 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:27:09,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:27:09,427 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:27:09,427 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:27:09,427 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:27:09,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:27:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:27:09,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:27:09,519 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:27:09,521 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:27:12,693 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:27:22,384 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:27:22,385 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:27:22,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:27:22 BoogieIcfgContainer [2023-04-01 10:27:22,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:27:22,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:27:22,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:27:22,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:27:22,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:27:08" (1/3) ... [2023-04-01 10:27:22,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13225639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:27:22, skipping insertion in model container [2023-04-01 10:27:22,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:09" (2/3) ... [2023-04-01 10:27:22,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13225639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:27:22, skipping insertion in model container [2023-04-01 10:27:22,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:27:22" (3/3) ... [2023-04-01 10:27:22,395 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label40.c [2023-04-01 10:27:22,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:27:22,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:27:22,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:27:22,478 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;@414bb48d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:27:22,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:27:22,485 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 10:27:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:27:22,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:22,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:27:22,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:22,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2084314647, now seen corresponding path program 1 times [2023-04-01 10:27:22,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:22,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20367367] [2023-04-01 10:27:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:22,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:27:22,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:27:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20367367] [2023-04-01 10:27:22,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20367367] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:27:22,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:27:22,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:27:22,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893171163] [2023-04-01 10:27:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:27:22,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:27:22,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:27:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:27:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:27:22,964 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 10:27:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:27:24,802 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:27:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:27:24,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:27:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:27:24,819 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:27:24,819 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:27:24,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:27:24,828 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 242 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:27:24,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 195 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 10:27:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:27:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:27:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5751633986928104) internal successors, (723), 459 states have internal predecessors, (723), 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 10:27:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 734 transitions. [2023-04-01 10:27:24,894 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 734 transitions. Word has length 11 [2023-04-01 10:27:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:27:24,895 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 734 transitions. [2023-04-01 10:27:24,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:27:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 734 transitions. [2023-04-01 10:27:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 10:27:24,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:24,897 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] [2023-04-01 10:27:24,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:27:24,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:24,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:24,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1413099769, now seen corresponding path program 1 times [2023-04-01 10:27:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:24,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195072752] [2023-04-01 10:27:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:24,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:27:25,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:27:25,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195072752] [2023-04-01 10:27:25,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195072752] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:27:25,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:27:25,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:27:25,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131895429] [2023-04-01 10:27:25,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:27:25,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:27:25,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:27:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:27:25,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:27:25,249 INFO L87 Difference]: Start difference. First operand 469 states and 734 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:27:26,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:27:26,791 INFO L93 Difference]: Finished difference Result 1393 states and 2202 transitions. [2023-04-01 10:27:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:27:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 26 [2023-04-01 10:27:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:27:26,797 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 10:27:26,798 INFO L226 Difference]: Without dead ends: 929 [2023-04-01 10:27:26,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:27:26,801 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 243 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:27:26,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 410 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:27:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2023-04-01 10:27:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 906. [2023-04-01 10:27:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 892 states have (on average 1.3934977578475336) internal successors, (1243), 892 states have internal predecessors, (1243), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-01 10:27:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1268 transitions. [2023-04-01 10:27:26,841 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1268 transitions. Word has length 26 [2023-04-01 10:27:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:27:26,842 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1268 transitions. [2023-04-01 10:27:26,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:27:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1268 transitions. [2023-04-01 10:27:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 10:27:26,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:26,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:27:26,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:27:26,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:26,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:26,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2120530703, now seen corresponding path program 1 times [2023-04-01 10:27:26,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:26,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329164726] [2023-04-01 10:27:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:26,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 10:27:27,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:27:27,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329164726] [2023-04-01 10:27:27,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329164726] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:27:27,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061749236] [2023-04-01 10:27:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:27,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:27:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:27:27,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:27:27,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:27:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:27,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:27:27,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:27:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:27:27,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:27:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:27:27,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061749236] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:27:27,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169577031] [2023-04-01 10:27:27,488 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 10:27:27,488 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:27:27,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:27:27,495 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:27:27,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:27:27,859 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 82 for LOIs [2023-04-01 10:27:28,169 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-04-01 10:27:28,219 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5876 conjuctions. This might take some time... [2023-04-01 10:27:28,490 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 180 conjuctions. [2023-04-01 10:27:28,821 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 45 [2023-04-01 10:27:29,796 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 18486 conjuctions. This might take some time... [2023-04-01 10:27:30,336 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 190 conjuctions. [2023-04-01 10:27:50,435 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 6182 conjuctions. This might take some time... [2023-04-01 10:27:52,815 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 6182 conjuctions.