/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/Problem13_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:10:02,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:10:02,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:10:02,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:10:02,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:10:02,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:10:02,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:10:02,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:10:02,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:10:02,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:10:02,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:10:02,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:10:02,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:10:02,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:10:02,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:10:02,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:10:02,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:10:02,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:10:02,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:10:02,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:10:02,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:10:02,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:10:02,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:10:02,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:10:02,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:10:02,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:10:02,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:10:02,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:10:02,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:10:02,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:10:02,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:10:02,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:10:02,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:10:02,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:10:02,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:10:02,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:10:02,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:10:02,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:10:02,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:10:02,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:10:02,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:10:02,277 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 10:10:02,290 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:10:02,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:10:02,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:10:02,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:10:02,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:10:02,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:10:02,291 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:10:02,291 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:10:02,291 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:10:02,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:10:02,291 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:10:02,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:10:02,292 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:10:02,292 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:10:02,292 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:10:02,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:10:02,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:10:02,292 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:10:02,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:10:02,293 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:10:02,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:10:02,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:10:02,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:10:02,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:10:02,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:10:02,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:10:02,294 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:10:02,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:10:02,294 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:10:02,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:10:02,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:10:02,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:10:02,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:10:02,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:10:02,295 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:10:02,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:10:02,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:10:02,296 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:10:02,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:10:02,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:10:02,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:10:02,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:10:02,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:10:02,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:10:02,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:10:02,456 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:10:02,457 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:10:02,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2023-04-01 10:10:03,444 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:10:03,748 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:10:03,748 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2023-04-01 10:10:03,774 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83caaaea7/fcbba7fc21ab492d856035320c3e30ad/FLAG681834c4b [2023-04-01 10:10:03,788 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83caaaea7/fcbba7fc21ab492d856035320c3e30ad [2023-04-01 10:10:03,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:10:03,791 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:10:03,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:10:03,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:10:03,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:10:03,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:10:03" (1/1) ... [2023-04-01 10:10:03,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d4f6a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:03, skipping insertion in model container [2023-04-01 10:10:03,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:10:03" (1/1) ... [2023-04-01 10:10:03,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:10:03,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:10:04,087 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/Problem13_label50.c[8814,8827] [2023-04-01 10:10:04,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:10:04,671 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:10:04,698 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/Problem13_label50.c[8814,8827] [2023-04-01 10:10:05,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:10:05,036 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:10:05,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05 WrapperNode [2023-04-01 10:10:05,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:10:05,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:10:05,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:10:05,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:10:05,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,225 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:10:05,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:10:05,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:10:05,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:10:05,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (1/1) ... [2023-04-01 10:10:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:10:05,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:05,359 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 10:10:05,364 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 10:10:05,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:10:05,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:10:05,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:10:05,389 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:10:05,389 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:10:05,389 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:10:05,391 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:10:05,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:10:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:10:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:10:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:10:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:10:05,392 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:10:05,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:10:05,445 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:10:05,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:10:09,017 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:10:11,058 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:10:11,058 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:10:11,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:10:11 BoogieIcfgContainer [2023-04-01 10:10:11,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:10:11,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:10:11,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:10:11,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:10:11,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:10:03" (1/3) ... [2023-04-01 10:10:11,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62305858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:10:11, skipping insertion in model container [2023-04-01 10:10:11,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:10:05" (2/3) ... [2023-04-01 10:10:11,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62305858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:10:11, skipping insertion in model container [2023-04-01 10:10:11,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:10:11" (3/3) ... [2023-04-01 10:10:11,066 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label50.c [2023-04-01 10:10:11,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:10:11,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:10:11,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:10:11,121 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;@753eb68f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:10:11,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:10:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:10:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:10:11,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:11,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:11,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:11,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash -330925772, now seen corresponding path program 1 times [2023-04-01 10:10:11,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:11,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296289969] [2023-04-01 10:10:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:11,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:11,521 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 10:10:11,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:11,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296289969] [2023-04-01 10:10:11,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296289969] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:11,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:11,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:10:11,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600091726] [2023-04-01 10:10:11,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:11,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:10:11,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:11,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:10:11,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:11,584 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 10:10:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:14,328 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:10:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:10:14,333 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 10:10:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:14,357 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:10:14,357 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:10:14,369 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 10:10:14,371 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:14,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 10:10:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:10:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-01 10:10:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:10:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-04-01 10:10:14,464 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-04-01 10:10:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:14,468 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-04-01 10:10:14,468 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 10:10:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-04-01 10:10:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 10:10:14,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:14,470 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] [2023-04-01 10:10:14,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:10:14,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:14,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -288882729, now seen corresponding path program 1 times [2023-04-01 10:10:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737331746] [2023-04-01 10:10:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:14,646 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 10:10:14,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:14,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737331746] [2023-04-01 10:10:14,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737331746] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:14,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:14,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:10:14,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335010141] [2023-04-01 10:10:14,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:14,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:14,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:14,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:10:14,649 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:10:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:18,705 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-04-01 10:10:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:10:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 27 [2023-04-01 10:10:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:18,716 INFO L225 Difference]: With dead ends: 4183 [2023-04-01 10:10:18,716 INFO L226 Difference]: Without dead ends: 2819 [2023-04-01 10:10:18,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:18,725 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 4325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:18,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4325 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 10:10:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-04-01 10:10:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-04-01 10:10:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-01 10:10:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-04-01 10:10:18,881 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-04-01 10:10:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:18,881 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-04-01 10:10:18,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:10:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-04-01 10:10:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 10:10:18,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:18,883 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] [2023-04-01 10:10:18,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:10:18,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:18,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:18,883 INFO L85 PathProgramCache]: Analyzing trace with hash 861022651, now seen corresponding path program 1 times [2023-04-01 10:10:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:18,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216577347] [2023-04-01 10:10:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:18,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:19,213 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 10:10:19,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:19,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216577347] [2023-04-01 10:10:19,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216577347] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:19,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:19,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:10:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871391191] [2023-04-01 10:10:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:19,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:10:19,217 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:10:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:24,378 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-04-01 10:10:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:10:24,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2023-04-01 10:10:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:24,409 INFO L225 Difference]: With dead ends: 8433 [2023-04-01 10:10:24,409 INFO L226 Difference]: Without dead ends: 5687 [2023-04-01 10:10:24,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:24,420 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2123 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:24,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-04-01 10:10:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-04-01 10:10:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-04-01 10:10:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5445 states have (on average 1.5074380165289256) internal successors, (8208), 5471 states have internal predecessors, (8208), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (413), 71 states have call predecessors, (413), 26 states have call successors, (413) [2023-04-01 10:10:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8648 transitions. [2023-04-01 10:10:24,558 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8648 transitions. Word has length 41 [2023-04-01 10:10:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:24,559 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8648 transitions. [2023-04-01 10:10:24,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:10:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8648 transitions. [2023-04-01 10:10:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:10:24,566 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:24,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:24,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:10:24,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:24,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash -727452813, now seen corresponding path program 1 times [2023-04-01 10:10:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:24,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385021417] [2023-04-01 10:10:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:24,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:10:24,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385021417] [2023-04-01 10:10:24,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385021417] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955448114] [2023-04-01 10:10:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:24,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:24,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:24,822 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 10:10:24,892 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 10:10:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:24,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:10:25,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:10:25,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:10:25,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955448114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:25,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:10:25,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:10:25,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753341467] [2023-04-01 10:10:25,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:25,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:25,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:25,098 INFO L87 Difference]: Start difference. First operand 5570 states and 8648 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:10:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:28,800 INFO L93 Difference]: Finished difference Result 16768 states and 27174 transitions. [2023-04-01 10:10:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:10:28,801 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-04-01 10:10:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:28,837 INFO L225 Difference]: With dead ends: 16768 [2023-04-01 10:10:28,838 INFO L226 Difference]: Without dead ends: 11203 [2023-04-01 10:10:28,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:10:28,852 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:28,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 10:10:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-04-01 10:10:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9834. [2023-04-01 10:10:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9575 states have (on average 1.370130548302872) internal successors, (13119), 9640 states have internal predecessors, (13119), 47 states have call successors, (47), 47 states have call predecessors, (47), 211 states have return successors, (1286), 146 states have call predecessors, (1286), 46 states have call successors, (1286) [2023-04-01 10:10:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 14452 transitions. [2023-04-01 10:10:29,045 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 14452 transitions. Word has length 42 [2023-04-01 10:10:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:29,045 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 14452 transitions. [2023-04-01 10:10:29,045 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), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:10:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 14452 transitions. [2023-04-01 10:10:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 10:10:29,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:29,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:29,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:10:29,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:29,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:29,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:29,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1227905226, now seen corresponding path program 1 times [2023-04-01 10:10:29,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:29,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242168314] [2023-04-01 10:10:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:29,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:10:29,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:29,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242168314] [2023-04-01 10:10:29,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242168314] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:29,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709298357] [2023-04-01 10:10:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:29,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:10:29,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:10:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:29,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:10:29,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:10:29,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:10:29,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709298357] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:29,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:10:29,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:10:29,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074242060] [2023-04-01 10:10:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:29,591 INFO L87 Difference]: Start difference. First operand 9834 states and 14452 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:10:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:34,054 INFO L93 Difference]: Finished difference Result 24791 states and 37431 transitions. [2023-04-01 10:10:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:10:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-04-01 10:10:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:34,096 INFO L225 Difference]: With dead ends: 24791 [2023-04-01 10:10:34,096 INFO L226 Difference]: Without dead ends: 14962 [2023-04-01 10:10:34,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:10:34,116 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:34,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 10:10:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2023-04-01 10:10:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 14607. [2023-04-01 10:10:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14607 states, 14159 states have (on average 1.2818701885726393) internal successors, (18150), 14285 states have internal predecessors, (18150), 68 states have call successors, (68), 68 states have call predecessors, (68), 379 states have return successors, (2708), 253 states have call predecessors, (2708), 67 states have call successors, (2708) [2023-04-01 10:10:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14607 states to 14607 states and 20926 transitions. [2023-04-01 10:10:34,371 INFO L78 Accepts]: Start accepts. Automaton has 14607 states and 20926 transitions. Word has length 45 [2023-04-01 10:10:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:34,373 INFO L495 AbstractCegarLoop]: Abstraction has 14607 states and 20926 transitions. [2023-04-01 10:10:34,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:10:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 14607 states and 20926 transitions. [2023-04-01 10:10:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 10:10:34,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:34,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:10:34,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:10:34,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:34,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:34,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1265692171, now seen corresponding path program 1 times [2023-04-01 10:10:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:34,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698151235] [2023-04-01 10:10:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:34,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 10:10:34,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:34,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698151235] [2023-04-01 10:10:34,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698151235] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:34,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:34,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:10:34,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568618515] [2023-04-01 10:10:34,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:34,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:10:34,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:34,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:10:34,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:34,710 INFO L87 Difference]: Start difference. First operand 14607 states and 20926 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:10:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:37,705 INFO L93 Difference]: Finished difference Result 30621 states and 45209 transitions. [2023-04-01 10:10:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:10:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 10:10:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:37,745 INFO L225 Difference]: With dead ends: 30621 [2023-04-01 10:10:37,745 INFO L226 Difference]: Without dead ends: 16019 [2023-04-01 10:10:37,771 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 10:10:37,771 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 691 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:37,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1187 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 10:10:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2023-04-01 10:10:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 15818. [2023-04-01 10:10:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15818 states, 15361 states have (on average 1.2357268407004753) internal successors, (18982), 15488 states have internal predecessors, (18982), 73 states have call successors, (73), 73 states have call predecessors, (73), 383 states have return successors, (2724), 256 states have call predecessors, (2724), 72 states have call successors, (2724) [2023-04-01 10:10:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15818 states to 15818 states and 21779 transitions. [2023-04-01 10:10:38,188 INFO L78 Accepts]: Start accepts. Automaton has 15818 states and 21779 transitions. Word has length 79 [2023-04-01 10:10:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:38,189 INFO L495 AbstractCegarLoop]: Abstraction has 15818 states and 21779 transitions. [2023-04-01 10:10:38,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:10:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 15818 states and 21779 transitions. [2023-04-01 10:10:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 10:10:38,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:38,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 10:10:38,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:10:38,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:38,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash 97281814, now seen corresponding path program 1 times [2023-04-01 10:10:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:38,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138785902] [2023-04-01 10:10:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:38,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 10:10:38,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:38,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138785902] [2023-04-01 10:10:38,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138785902] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:38,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:38,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:10:38,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516852387] [2023-04-01 10:10:38,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:38,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:10:38,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:38,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:10:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:38,352 INFO L87 Difference]: Start difference. First operand 15818 states and 21779 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:10:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:41,282 INFO L93 Difference]: Finished difference Result 36536 states and 51969 transitions. [2023-04-01 10:10:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:10:41,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 93 [2023-04-01 10:10:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:41,324 INFO L225 Difference]: With dead ends: 36536 [2023-04-01 10:10:41,324 INFO L226 Difference]: Without dead ends: 20723 [2023-04-01 10:10:41,340 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 10:10:41,340 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 677 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:41,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1263 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 10:10:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20723 states. [2023-04-01 10:10:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20723 to 20559. [2023-04-01 10:10:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 19994 states have (on average 1.2070121036310892) internal successors, (24133), 20152 states have internal predecessors, (24133), 94 states have call successors, (94), 94 states have call predecessors, (94), 470 states have return successors, (3808), 312 states have call predecessors, (3808), 93 states have call successors, (3808) [2023-04-01 10:10:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 28035 transitions. [2023-04-01 10:10:41,625 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 28035 transitions. Word has length 93 [2023-04-01 10:10:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:41,625 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 28035 transitions. [2023-04-01 10:10:41,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:10:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 28035 transitions. [2023-04-01 10:10:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 10:10:41,632 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:41,632 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 10:10:41,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 10:10:41,632 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:41,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:41,633 INFO L85 PathProgramCache]: Analyzing trace with hash -51241598, now seen corresponding path program 1 times [2023-04-01 10:10:41,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:41,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946995425] [2023-04-01 10:10:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:41,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:10:41,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:41,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946995425] [2023-04-01 10:10:41,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946995425] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:41,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963358791] [2023-04-01 10:10:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:41,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:41,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:10:41,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:10:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:42,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:10:42,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:10:42,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:10:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:10:42,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963358791] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:10:42,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [708703540] [2023-04-01 10:10:42,225 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-01 10:10:42,225 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:10:42,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:10:42,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:10:42,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:10:42,382 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs [2023-04-01 10:10:42,628 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56 [2023-04-01 10:10:43,045 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 9527 conjuctions. This might take some time... [2023-04-01 10:10:43,134 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 25 conjuctions. [2023-04-01 10:10:44,422 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8700 conjuctions. This might take some time... [2023-04-01 10:10:45,785 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 2088 conjuctions. [2023-04-01 10:10:52,030 WARN L223 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 837 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)