/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:05:34,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:05:34,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:05:34,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:05:34,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:05:34,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:05:34,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:05:34,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:05:34,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:05:34,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:05:34,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:05:34,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:05:34,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:05:34,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:05:34,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:05:34,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:05:34,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:05:34,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:05:34,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:05:34,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:05:34,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:05:34,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:05:34,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:05:34,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:05:34,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:05:34,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:05:34,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:05:34,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:05:34,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:05:34,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:05:34,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:05:34,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:05:34,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:05:34,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:05:34,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:05:34,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:05:34,385 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 [2023-03-31 22:05:34,412 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:05:34,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:05:34,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:05:34,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:05:34,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:05:34,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:05:34,414 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:05:34,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:05:34,415 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:05:34,415 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:05:34,415 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:05:34,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:05:34,416 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:05:34,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:05:34,416 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:05:34,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:05:34,416 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:05:34,416 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:05:34,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:05:34,417 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:05:34,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:05:34,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:05:34,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:05:34,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:05:34,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:05:34,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:05:34,418 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:05:34,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:05:34,419 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:05:34,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:05:34,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:05:34,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:05:34,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:05:34,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:05:34,420 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:05:34,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:05:34,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:05:34,420 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:05:34,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:05:34,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:05:34,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:05:34,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:05:34,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:05:34,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:05:34,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:05:34,680 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:05:34,681 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:05:34,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label53.c [2023-03-31 22:05:35,903 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:05:36,404 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:05:36,404 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label53.c [2023-03-31 22:05:36,434 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba955e28c/c0b2e45531884c4fa33508c14e6926d9/FLAG14d4c14c6 [2023-03-31 22:05:36,450 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba955e28c/c0b2e45531884c4fa33508c14e6926d9 [2023-03-31 22:05:36,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:05:36,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:05:36,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:05:36,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:05:36,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:05:36,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:05:36" (1/1) ... [2023-03-31 22:05:36,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d21ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:36, skipping insertion in model container [2023-03-31 22:05:36,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:05:36" (1/1) ... [2023-03-31 22:05:36,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:05:36,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:05:36,911 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_label53.c[4658,4671] [2023-03-31 22:05:37,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:05:37,749 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:05:37,775 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_label53.c[4658,4671] [2023-03-31 22:05:38,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:05:38,241 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:05:38,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38 WrapperNode [2023-03-31 22:05:38,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:05:38,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:05:38,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:05:38,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:05:38,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:05:38,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:05:38,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:05:38,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:05:38,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (1/1) ... [2023-03-31 22:05:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:05:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:05:38,614 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) [2023-03-31 22:05:38,636 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 [2023-03-31 22:05:38,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:05:38,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:05:38,655 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:05:38,658 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:05:38,659 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:05:38,659 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:05:38,659 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:05:38,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:05:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:05:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:05:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:05:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:05:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:05:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:05:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:05:38,745 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:05:38,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:05:43,613 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:05:46,429 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:05:46,430 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:05:46,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:05:46 BoogieIcfgContainer [2023-03-31 22:05:46,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:05:46,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:05:46,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:05:46,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:05:46,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:05:36" (1/3) ... [2023-03-31 22:05:46,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c044eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:05:46, skipping insertion in model container [2023-03-31 22:05:46,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:05:38" (2/3) ... [2023-03-31 22:05:46,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c044eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:05:46, skipping insertion in model container [2023-03-31 22:05:46,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:05:46" (3/3) ... [2023-03-31 22:05:46,441 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label53.c [2023-03-31 22:05:46,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:05:46,457 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:05:46,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:05:46,514 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;@2acc0a82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:05:46,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:05:46,520 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) [2023-03-31 22:05:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:05:46,526 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:46,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:05:46,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:46,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash -330933708, now seen corresponding path program 1 times [2023-03-31 22:05:46,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:46,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30773719] [2023-03-31 22:05:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:05:46,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:46,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30773719] [2023-03-31 22:05:46,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30773719] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:46,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:05:46,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:05:46,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746818500] [2023-03-31 22:05:46,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:46,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:05:46,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:05:46,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:05:46,934 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) [2023-03-31 22:05:50,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:50,405 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:05:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:05:50,411 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 [2023-03-31 22:05:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:50,431 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:05:50,432 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:05:50,440 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 [2023-03-31 22:05:50,444 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 3.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:50,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-31 22:05:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:05:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-03-31 22:05:50,538 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) [2023-03-31 22:05:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-03-31 22:05:50,545 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-03-31 22:05:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:50,545 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-03-31 22:05:50,545 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) [2023-03-31 22:05:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-03-31 22:05:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:05:50,547 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:50,547 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] [2023-03-31 22:05:50,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:05:50,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:50,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1930211471, now seen corresponding path program 1 times [2023-03-31 22:05:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:50,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145111758] [2023-03-31 22:05:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:50,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:05:50,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:50,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145111758] [2023-03-31 22:05:50,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145111758] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:50,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:05:50,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:05:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99723159] [2023-03-31 22:05:50,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:05:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:05:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:05:50,786 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) [2023-03-31 22:05:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:05:55,757 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-03-31 22:05:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:05:55,757 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 [2023-03-31 22:05:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:05:55,771 INFO L225 Difference]: With dead ends: 4183 [2023-03-31 22:05:55,771 INFO L226 Difference]: Without dead ends: 2819 [2023-03-31 22:05:55,775 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 [2023-03-31 22:05:55,776 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:05:55,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4325 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-03-31 22:05:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-03-31 22:05:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-03-31 22:05:55,846 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) [2023-03-31 22:05:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-03-31 22:05:55,858 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-03-31 22:05:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:05:55,858 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-03-31 22:05:55,858 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) [2023-03-31 22:05:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-03-31 22:05:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:05:55,860 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:05:55,860 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] [2023-03-31 22:05:55,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:05:55,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:05:55,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:05:55,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2145575893, now seen corresponding path program 1 times [2023-03-31 22:05:55,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:05:55,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862907539] [2023-03-31 22:05:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:05:55,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:05:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:05:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:05:56,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:05:56,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862907539] [2023-03-31 22:05:56,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862907539] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:05:56,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:05:56,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:05:56,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96835233] [2023-03-31 22:05:56,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:05:56,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:05:56,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:05:56,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:05:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:05:56,016 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) [2023-03-31 22:06:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:01,009 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-03-31 22:06:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:06:01,017 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 [2023-03-31 22:06:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:01,051 INFO L225 Difference]: With dead ends: 8433 [2023-03-31 22:06:01,052 INFO L226 Difference]: Without dead ends: 5687 [2023-03-31 22:06:01,060 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 [2023-03-31 22:06:01,061 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, 4.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:01,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-03-31 22:06:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-03-31 22:06:01,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-03-31 22:06:01,221 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) [2023-03-31 22:06:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8648 transitions. [2023-03-31 22:06:01,244 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8648 transitions. Word has length 41 [2023-03-31 22:06:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:01,244 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8648 transitions. [2023-03-31 22:06:01,245 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) [2023-03-31 22:06:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8648 transitions. [2023-03-31 22:06:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 22:06:01,253 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:01,253 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] [2023-03-31 22:06:01,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:06:01,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:01,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:01,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1233110508, now seen corresponding path program 1 times [2023-03-31 22:06:01,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:01,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946488062] [2023-03-31 22:06:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:01,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:06:01,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:01,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946488062] [2023-03-31 22:06:01,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946488062] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:06:01,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681523864] [2023-03-31 22:06:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:01,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:06:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:06:01,425 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) [2023-03-31 22:06:01,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:06:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:01,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:06:01,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:06:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:06:01,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:06:01,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681523864] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:01,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:06:01,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:06:01,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434399282] [2023-03-31 22:06:01,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:01,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:06:01,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:06:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:06:01,661 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) [2023-03-31 22:06:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:05,788 INFO L93 Difference]: Finished difference Result 16768 states and 27174 transitions. [2023-03-31 22:06:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:06:05,789 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 [2023-03-31 22:06:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:05,843 INFO L225 Difference]: With dead ends: 16768 [2023-03-31 22:06:05,844 INFO L226 Difference]: Without dead ends: 11203 [2023-03-31 22:06:05,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:06:05,868 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s 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, 3.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:05,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-31 22:06:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-03-31 22:06:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9834. [2023-03-31 22:06:06,135 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) [2023-03-31 22:06:06,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 14452 transitions. [2023-03-31 22:06:06,320 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 14452 transitions. Word has length 42 [2023-03-31 22:06:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:06,321 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 14452 transitions. [2023-03-31 22:06:06,321 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) [2023-03-31 22:06:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 14452 transitions. [2023-03-31 22:06:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 22:06:06,322 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:06,322 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] [2023-03-31 22:06:06,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:06:06,527 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 [2023-03-31 22:06:06,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:06,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash -857361686, now seen corresponding path program 1 times [2023-03-31 22:06:06,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:06,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523148350] [2023-03-31 22:06:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:06,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:06:06,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:06,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523148350] [2023-03-31 22:06:06,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523148350] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:06:06,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567940833] [2023-03-31 22:06:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:06,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:06:06,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:06:06,797 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) [2023-03-31 22:06:06,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:06:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:06,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:06:06,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:06:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:06:06,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:06:06,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567940833] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:06,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:06:06,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:06:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097732068] [2023-03-31 22:06:06,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:06,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:06:06,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:06:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:06:06,973 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) [2023-03-31 22:06:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:11,354 INFO L93 Difference]: Finished difference Result 24791 states and 37431 transitions. [2023-03-31 22:06:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:06:11,355 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 [2023-03-31 22:06:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:11,431 INFO L225 Difference]: With dead ends: 24791 [2023-03-31 22:06:11,431 INFO L226 Difference]: Without dead ends: 14962 [2023-03-31 22:06:11,458 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 [2023-03-31 22:06:11,460 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s 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, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:11,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 22:06:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2023-03-31 22:06:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 14607. [2023-03-31 22:06:11,804 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) [2023-03-31 22:06:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14607 states to 14607 states and 20926 transitions. [2023-03-31 22:06:11,840 INFO L78 Accepts]: Start accepts. Automaton has 14607 states and 20926 transitions. Word has length 45 [2023-03-31 22:06:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:11,842 INFO L495 AbstractCegarLoop]: Abstraction has 14607 states and 20926 transitions. [2023-03-31 22:06:11,842 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) [2023-03-31 22:06:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 14607 states and 20926 transitions. [2023-03-31 22:06:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 22:06:11,845 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:11,845 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] [2023-03-31 22:06:11,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:06:12,057 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 [2023-03-31 22:06:12,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:12,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:12,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1726239555, now seen corresponding path program 1 times [2023-03-31 22:06:12,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:12,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159710846] [2023-03-31 22:06:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:12,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-31 22:06:12,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:12,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159710846] [2023-03-31 22:06:12,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159710846] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:12,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:06:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:06:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621353085] [2023-03-31 22:06:12,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:12,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:06:12,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:12,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:06:12,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:06:12,319 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) [2023-03-31 22:06:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:15,640 INFO L93 Difference]: Finished difference Result 30621 states and 45209 transitions. [2023-03-31 22:06:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:06:15,641 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 [2023-03-31 22:06:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:15,703 INFO L225 Difference]: With dead ends: 30621 [2023-03-31 22:06:15,703 INFO L226 Difference]: Without dead ends: 16019 [2023-03-31 22:06:15,737 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 [2023-03-31 22:06:15,738 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 691 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:15,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1187 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 22:06:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2023-03-31 22:06:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 15818. [2023-03-31 22:06:16,080 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) [2023-03-31 22:06:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15818 states to 15818 states and 21779 transitions. [2023-03-31 22:06:16,115 INFO L78 Accepts]: Start accepts. Automaton has 15818 states and 21779 transitions. Word has length 79 [2023-03-31 22:06:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:16,117 INFO L495 AbstractCegarLoop]: Abstraction has 15818 states and 21779 transitions. [2023-03-31 22:06:16,117 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) [2023-03-31 22:06:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 15818 states and 21779 transitions. [2023-03-31 22:06:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-03-31 22:06:16,119 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:16,119 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] [2023-03-31 22:06:16,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:06:16,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:16,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash -612159798, now seen corresponding path program 1 times [2023-03-31 22:06:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:16,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455820338] [2023-03-31 22:06:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:16,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-03-31 22:06:16,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:16,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455820338] [2023-03-31 22:06:16,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455820338] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:06:16,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:06:16,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:06:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111497170] [2023-03-31 22:06:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:06:16,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:06:16,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:06:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:06:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:06:16,348 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) [2023-03-31 22:06:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:06:19,660 INFO L93 Difference]: Finished difference Result 36536 states and 51969 transitions. [2023-03-31 22:06:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:06:19,661 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 [2023-03-31 22:06:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:06:19,722 INFO L225 Difference]: With dead ends: 36536 [2023-03-31 22:06:19,722 INFO L226 Difference]: Without dead ends: 20723 [2023-03-31 22:06:19,750 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 [2023-03-31 22:06:19,751 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 677 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:06:19,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1263 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 22:06:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20723 states. [2023-03-31 22:06:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20723 to 20559. [2023-03-31 22:06:20,108 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) [2023-03-31 22:06:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 28035 transitions. [2023-03-31 22:06:20,155 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 28035 transitions. Word has length 93 [2023-03-31 22:06:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:06:20,158 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 28035 transitions. [2023-03-31 22:06:20,158 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) [2023-03-31 22:06:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 28035 transitions. [2023-03-31 22:06:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-03-31 22:06:20,161 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:06:20,161 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] [2023-03-31 22:06:20,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 22:06:20,162 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:06:20,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:06:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2031035802, now seen corresponding path program 1 times [2023-03-31 22:06:20,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:06:20,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072317419] [2023-03-31 22:06:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:20,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:06:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:06:20,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:06:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072317419] [2023-03-31 22:06:20,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072317419] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:06:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766377585] [2023-03-31 22:06:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:06:20,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:06:20,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:06:20,376 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) [2023-03-31 22:06:20,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:06:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:06:20,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:06:20,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:06:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:06:20,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:06:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 22:06:20,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766377585] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:06:20,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381852438] [2023-03-31 22:06:20,720 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-03-31 22:06:20,720 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:06:20,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:06:20,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:06:20,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:06:20,864 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-03-31 22:06:21,007 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2023-03-31 22:06:21,240 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2023-03-31 22:06:21,389 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7088 conjuctions. This might take some time... [2023-03-31 22:06:21,483 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 73 conjuctions. [2023-03-31 22:06:22,932 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 56 for LOIs [2023-03-31 22:06:23,058 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2023-03-31 22:06:23,414 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16960 conjuctions. This might take some time... [2023-03-31 22:06:25,343 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 425 conjuctions.