/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:23:29,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:23:29,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:23:29,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:23:29,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:23:29,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:23:29,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:23:29,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:23:29,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:23:29,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:23:29,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:23:29,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:23:29,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:23:29,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:23:29,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:23:29,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:23:29,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:23:29,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:23:29,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:23:29,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:23:29,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:23:29,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:23:29,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:23:29,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:23:29,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-30 23:23:29,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-30 23:23:29,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-30 23:23:29,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-30 23:23:29,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-30 23:23:29,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-30 23:23:29,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:23:29,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:23:29,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:23:29,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:23:29,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:23:29,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:23:29,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:23:29,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:23:29,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:23:29,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:23:29,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:23:29,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:23:29,388 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:23:29,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:23:29,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:23:29,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:23:29,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:23:29,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:23:29,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:23:29,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:23:29,390 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:23:29,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:23:29,391 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:23:29,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:23:29,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:23:29,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:23:29,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:23:29,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:23:29,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:23:29,392 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:23:29,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:23:29,392 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:23:29,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:23:29,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:23:29,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:23:29,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:23:29,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:23:29,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:23:29,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:23:29,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:23:29,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:23:29,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:23:29,393 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:23:29,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:23:29,393 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:23:29,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:23:29,393 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:23:29,394 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:23:29,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:23:29,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:23:29,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:23:29,585 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:23:29,586 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:23:29,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label11.c [2023-03-30 23:23:30,688 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:23:31,122 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:23:31,122 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label11.c [2023-03-30 23:23:31,172 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8784d4d/719f1adf28c94eee8309e2b03e2d4ebd/FLAG0efdb24c0 [2023-03-30 23:23:31,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8784d4d/719f1adf28c94eee8309e2b03e2d4ebd [2023-03-30 23:23:31,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:23:31,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:23:31,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:23:31,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:23:31,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:23:31,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:23:31" (1/1) ... [2023-03-30 23:23:31,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4569b6f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:31, skipping insertion in model container [2023-03-30 23:23:31,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:23:31" (1/1) ... [2023-03-30 23:23:31,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:23:31,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:23:31,474 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_label11.c[3906,3919] [2023-03-30 23:23:32,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:23:32,139 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:23:32,162 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_label11.c[3906,3919] [2023-03-30 23:23:32,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:23:32,504 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:23:32,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32 WrapperNode [2023-03-30 23:23:32,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:23:32,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:23:32,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:23:32,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:23:32,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,731 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:23:32,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:23:32,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:23:32,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:23:32,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (1/1) ... [2023-03-30 23:23:32,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:23:32,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:23:32,788 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) [2023-03-30 23:23:32,794 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 [2023-03-30 23:23:32,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:23:32,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:23:32,812 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:23:32,812 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:23:32,812 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:23:32,812 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:23:32,812 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:23:32,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:23:32,812 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:23:32,812 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:23:32,813 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:23:32,813 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:23:32,813 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:23:32,813 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:23:32,813 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:23:32,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:23:32,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:23:32,862 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:23:32,864 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:23:36,630 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:23:36,640 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:23:36,640 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:23:36,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:23:36 BoogieIcfgContainer [2023-03-30 23:23:36,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:23:36,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:23:36,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:23:36,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:23:36,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:23:31" (1/3) ... [2023-03-30 23:23:36,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3654dfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:23:36, skipping insertion in model container [2023-03-30 23:23:36,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:23:32" (2/3) ... [2023-03-30 23:23:36,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3654dfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:23:36, skipping insertion in model container [2023-03-30 23:23:36,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:23:36" (3/3) ... [2023-03-30 23:23:36,648 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label11.c [2023-03-30 23:23:36,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:23:36,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:23:36,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:23:36,708 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=PETRI_NET, 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;@51f75c01, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:23:36,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:23:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 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) [2023-03-30 23:23:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-30 23:23:36,719 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:36,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:36,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:36,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:36,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1244556103, now seen corresponding path program 1 times [2023-03-30 23:23:36,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:36,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690783256] [2023-03-30 23:23:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:36,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:37,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:37,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:37,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690783256] [2023-03-30 23:23:37,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690783256] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:37,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:23:37,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:23:37,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142841248] [2023-03-30 23:23:37,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:37,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:23:37,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:23:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:23:37,150 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 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 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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) [2023-03-30 23:23:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:43,544 INFO L93 Difference]: Finished difference Result 3243 states and 5948 transitions. [2023-03-30 23:23:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:23:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 32 [2023-03-30 23:23:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:43,565 INFO L225 Difference]: With dead ends: 3243 [2023-03-30 23:23:43,565 INFO L226 Difference]: Without dead ends: 2045 [2023-03-30 23:23:43,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:23:43,579 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 3038 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4184 mSolverCounterSat, 994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3038 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 5178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 994 IncrementalHoareTripleChecker+Valid, 4184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:43,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3038 Valid, 270 Invalid, 5178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [994 Valid, 4184 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-03-30 23:23:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2023-03-30 23:23:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1988. [2023-03-30 23:23:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1960 states have (on average 1.7846938775510204) internal successors, (3498), 1962 states have internal predecessors, (3498), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-03-30 23:23:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3533 transitions. [2023-03-30 23:23:43,698 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3533 transitions. Word has length 32 [2023-03-30 23:23:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:43,698 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 3533 transitions. [2023-03-30 23:23:43,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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) [2023-03-30 23:23:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3533 transitions. [2023-03-30 23:23:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-03-30 23:23:43,701 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:43,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:43,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:23:43,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:43,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:43,702 INFO L85 PathProgramCache]: Analyzing trace with hash -627307815, now seen corresponding path program 1 times [2023-03-30 23:23:43,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:43,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354197557] [2023-03-30 23:23:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:43,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:43,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:43,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:44,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:44,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354197557] [2023-03-30 23:23:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354197557] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:44,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:23:44,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:23:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177640200] [2023-03-30 23:23:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:44,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:23:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:44,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:23:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:23:44,015 INFO L87 Difference]: Start difference. First operand 1988 states and 3533 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 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) [2023-03-30 23:23:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:51,559 INFO L93 Difference]: Finished difference Result 7338 states and 13417 transitions. [2023-03-30 23:23:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:23:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 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 101 [2023-03-30 23:23:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:51,581 INFO L225 Difference]: With dead ends: 7338 [2023-03-30 23:23:51,581 INFO L226 Difference]: Without dead ends: 5356 [2023-03-30 23:23:51,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:23:51,593 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 5285 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 7921 mSolverCounterSat, 2185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5285 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 10106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2185 IncrementalHoareTripleChecker+Valid, 7921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:51,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5285 Valid, 709 Invalid, 10106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2185 Valid, 7921 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-03-30 23:23:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5356 states. [2023-03-30 23:23:51,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5356 to 5331. [2023-03-30 23:23:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5228 states have (on average 1.5003825554705432) internal successors, (7844), 5242 states have internal predecessors, (7844), 26 states have call successors, (26), 26 states have call predecessors, (26), 76 states have return successors, (225), 62 states have call predecessors, (225), 25 states have call successors, (225) [2023-03-30 23:23:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 8095 transitions. [2023-03-30 23:23:51,718 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 8095 transitions. Word has length 101 [2023-03-30 23:23:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:51,718 INFO L495 AbstractCegarLoop]: Abstraction has 5331 states and 8095 transitions. [2023-03-30 23:23:51,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 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) [2023-03-30 23:23:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 8095 transitions. [2023-03-30 23:23:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-03-30 23:23:51,724 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:51,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:51,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:23:51,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:51,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:51,725 INFO L85 PathProgramCache]: Analyzing trace with hash -172114355, now seen corresponding path program 1 times [2023-03-30 23:23:51,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:51,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377771266] [2023-03-30 23:23:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:51,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:51,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:52,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377771266] [2023-03-30 23:23:52,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377771266] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:52,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:23:52,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:23:52,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920003770] [2023-03-30 23:23:52,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:52,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:23:52,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:23:52,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:23:52,042 INFO L87 Difference]: Start difference. First operand 5331 states and 8095 transitions. Second operand has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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) [2023-03-30 23:23:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:23:58,439 INFO L93 Difference]: Finished difference Result 16024 states and 25154 transitions. [2023-03-30 23:23:58,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:23:58,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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 107 [2023-03-30 23:23:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:23:58,480 INFO L225 Difference]: With dead ends: 16024 [2023-03-30 23:23:58,480 INFO L226 Difference]: Without dead ends: 10699 [2023-03-30 23:23:58,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:23:58,497 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 3157 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 8252 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3157 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 9413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 8252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:23:58,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3157 Valid, 786 Invalid, 9413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 8252 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-03-30 23:23:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10699 states. [2023-03-30 23:23:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10699 to 10504. [2023-03-30 23:23:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10504 states, 10232 states have (on average 1.3575058639562159) internal successors, (13890), 10286 states have internal predecessors, (13890), 50 states have call successors, (50), 50 states have call predecessors, (50), 221 states have return successors, (917), 167 states have call predecessors, (917), 49 states have call successors, (917) [2023-03-30 23:23:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10504 states to 10504 states and 14857 transitions. [2023-03-30 23:23:58,706 INFO L78 Accepts]: Start accepts. Automaton has 10504 states and 14857 transitions. Word has length 107 [2023-03-30 23:23:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:23:58,707 INFO L495 AbstractCegarLoop]: Abstraction has 10504 states and 14857 transitions. [2023-03-30 23:23:58,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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) [2023-03-30 23:23:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 10504 states and 14857 transitions. [2023-03-30 23:23:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-03-30 23:23:58,712 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:23:58,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:23:58,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:23:58,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:23:58,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:23:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash 836373393, now seen corresponding path program 1 times [2023-03-30 23:23:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:23:58,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788348689] [2023-03-30 23:23:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:23:58,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:23:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:58,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:23:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:58,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:23:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:23:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:23:59,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:23:59,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788348689] [2023-03-30 23:23:59,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788348689] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:23:59,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:23:59,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:23:59,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67363312] [2023-03-30 23:23:59,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:23:59,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:23:59,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:23:59,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:23:59,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:23:59,040 INFO L87 Difference]: Start difference. First operand 10504 states and 14857 transitions. Second operand has 8 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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) [2023-03-30 23:24:07,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:07,271 INFO L93 Difference]: Finished difference Result 40087 states and 62005 transitions. [2023-03-30 23:24:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:24:07,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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 137 [2023-03-30 23:24:07,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:07,379 INFO L225 Difference]: With dead ends: 40087 [2023-03-30 23:24:07,380 INFO L226 Difference]: Without dead ends: 29589 [2023-03-30 23:24:07,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:24:07,416 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 5706 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 9436 mSolverCounterSat, 2207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5706 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 11643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2207 IncrementalHoareTripleChecker+Valid, 9436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:07,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5706 Valid, 886 Invalid, 11643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2207 Valid, 9436 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2023-03-30 23:24:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29589 states. [2023-03-30 23:24:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29589 to 29507. [2023-03-30 23:24:08,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29507 states, 28552 states have (on average 1.261242644998599) internal successors, (36011), 28803 states have internal predecessors, (36011), 138 states have call successors, (138), 138 states have call predecessors, (138), 816 states have return successors, (6615), 565 states have call predecessors, (6615), 137 states have call successors, (6615) [2023-03-30 23:24:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29507 states to 29507 states and 42764 transitions. [2023-03-30 23:24:08,129 INFO L78 Accepts]: Start accepts. Automaton has 29507 states and 42764 transitions. Word has length 137 [2023-03-30 23:24:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:08,130 INFO L495 AbstractCegarLoop]: Abstraction has 29507 states and 42764 transitions. [2023-03-30 23:24:08,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.714285714285715) internal successors, (131), 5 states have internal predecessors, (131), 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) [2023-03-30 23:24:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 29507 states and 42764 transitions. [2023-03-30 23:24:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-03-30 23:24:08,132 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:08,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:08,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 23:24:08,132 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:08,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash 489459969, now seen corresponding path program 1 times [2023-03-30 23:24:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:08,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080862625] [2023-03-30 23:24:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:08,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:08,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:08,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:08,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080862625] [2023-03-30 23:24:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080862625] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:24:08,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325641499] [2023-03-30 23:24:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:08,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:08,329 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) [2023-03-30 23:24:08,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:24:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:08,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:24:08,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:24:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:08,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:24:08,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325641499] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:08,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:24:08,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:24:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390948751] [2023-03-30 23:24:08,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:08,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:24:08,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:24:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:24:08,524 INFO L87 Difference]: Start difference. First operand 29507 states and 42764 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:24:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:11,437 INFO L93 Difference]: Finished difference Result 59009 states and 85706 transitions. [2023-03-30 23:24:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:24:11,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-03-30 23:24:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:11,517 INFO L225 Difference]: With dead ends: 59009 [2023-03-30 23:24:11,517 INFO L226 Difference]: Without dead ends: 29508 [2023-03-30 23:24:11,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:24:11,570 INFO L413 NwaCegarLoop]: 1413 mSDtfsCounter, 1200 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:11,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 1519 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 23:24:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29508 states. [2023-03-30 23:24:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29508 to 25482. [2023-03-30 23:24:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25482 states, 24571 states have (on average 1.194578975214684) internal successors, (29352), 24820 states have internal predecessors, (29352), 118 states have call successors, (118), 118 states have call predecessors, (118), 792 states have return successors, (4281), 543 states have call predecessors, (4281), 117 states have call successors, (4281) [2023-03-30 23:24:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25482 states to 25482 states and 33751 transitions. [2023-03-30 23:24:12,213 INFO L78 Accepts]: Start accepts. Automaton has 25482 states and 33751 transitions. Word has length 152 [2023-03-30 23:24:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:12,214 INFO L495 AbstractCegarLoop]: Abstraction has 25482 states and 33751 transitions. [2023-03-30 23:24:12,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:24:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 25482 states and 33751 transitions. [2023-03-30 23:24:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-03-30 23:24:12,217 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:12,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:12,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:24:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:12,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:12,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:12,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1447445615, now seen corresponding path program 1 times [2023-03-30 23:24:12,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:12,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239822369] [2023-03-30 23:24:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:12,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:12,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:12,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:12,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-03-30 23:24:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:24:12,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:12,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239822369] [2023-03-30 23:24:12,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239822369] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:24:12,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091522029] [2023-03-30 23:24:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:12,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:12,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:12,737 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) [2023-03-30 23:24:12,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:24:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:12,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:24:12,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:24:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:13,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:24:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:24:13,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091522029] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:24:13,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:24:13,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:24:13,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012672204] [2023-03-30 23:24:13,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:24:13,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:24:13,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:13,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:24:13,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:24:13,202 INFO L87 Difference]: Start difference. First operand 25482 states and 33751 transitions. Second operand has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 9 states have internal predecessors, (348), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:24:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:18,750 INFO L93 Difference]: Finished difference Result 76632 states and 108483 transitions. [2023-03-30 23:24:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 23:24:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 9 states have internal predecessors, (348), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 221 [2023-03-30 23:24:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:19,009 INFO L225 Difference]: With dead ends: 76632 [2023-03-30 23:24:19,009 INFO L226 Difference]: Without dead ends: 51156 [2023-03-30 23:24:19,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 443 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:24:19,052 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 7026 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 1722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7026 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 7667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1722 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:19,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7026 Valid, 721 Invalid, 7667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1722 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-03-30 23:24:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51156 states. [2023-03-30 23:24:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51156 to 50825. [2023-03-30 23:24:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50825 states, 48932 states have (on average 1.1505150004087306) internal successors, (56297), 49492 states have internal predecessors, (56297), 234 states have call successors, (234), 234 states have call predecessors, (234), 1658 states have return successors, (10196), 1098 states have call predecessors, (10196), 233 states have call successors, (10196) [2023-03-30 23:24:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50825 states to 50825 states and 66727 transitions. [2023-03-30 23:24:20,204 INFO L78 Accepts]: Start accepts. Automaton has 50825 states and 66727 transitions. Word has length 221 [2023-03-30 23:24:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:20,204 INFO L495 AbstractCegarLoop]: Abstraction has 50825 states and 66727 transitions. [2023-03-30 23:24:20,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.636363636363637) internal successors, (348), 9 states have internal predecessors, (348), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:24:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 50825 states and 66727 transitions. [2023-03-30 23:24:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-03-30 23:24:20,210 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:20,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:20,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:24:20,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-30 23:24:20,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:20,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:20,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1330926600, now seen corresponding path program 1 times [2023-03-30 23:24:20,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:20,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082161673] [2023-03-30 23:24:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:20,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:20,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:20,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:20,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-03-30 23:24:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:24:20,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082161673] [2023-03-30 23:24:20,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082161673] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:24:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001327213] [2023-03-30 23:24:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:20,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:20,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:20,825 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) [2023-03-30 23:24:20,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:24:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:20,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:24:20,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:24:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-03-30 23:24:21,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:24:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001327213] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:24:21,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:24:21,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 23:24:21,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312876995] [2023-03-30 23:24:21,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:24:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:24:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:24:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:24:21,034 INFO L87 Difference]: Start difference. First operand 50825 states and 66727 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2023-03-30 23:24:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:24:24,507 INFO L93 Difference]: Finished difference Result 137345 states and 185280 transitions. [2023-03-30 23:24:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:24:24,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 254 [2023-03-30 23:24:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:24:24,869 INFO L225 Difference]: With dead ends: 137345 [2023-03-30 23:24:24,869 INFO L226 Difference]: Without dead ends: 86526 [2023-03-30 23:24:24,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:24:24,914 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 1011 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 3442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:24:24,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 601 Invalid, 3442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 23:24:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86526 states. [2023-03-30 23:24:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86526 to 70363. [2023-03-30 23:24:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70363 states, 68171 states have (on average 1.1512813366387467) internal successors, (78484), 68784 states have internal predecessors, (78484), 330 states have call successors, (330), 330 states have call predecessors, (330), 1861 states have return successors, (14829), 1248 states have call predecessors, (14829), 329 states have call successors, (14829) [2023-03-30 23:24:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70363 states to 70363 states and 93643 transitions. [2023-03-30 23:24:26,379 INFO L78 Accepts]: Start accepts. Automaton has 70363 states and 93643 transitions. Word has length 254 [2023-03-30 23:24:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:24:26,380 INFO L495 AbstractCegarLoop]: Abstraction has 70363 states and 93643 transitions. [2023-03-30 23:24:26,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2023-03-30 23:24:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 70363 states and 93643 transitions. [2023-03-30 23:24:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-03-30 23:24:26,386 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:24:26,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:24:26,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:24:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:26,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:24:26,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:24:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1147315857, now seen corresponding path program 1 times [2023-03-30 23:24:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:24:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763959154] [2023-03-30 23:24:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:24:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:24:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:24:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:26,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-03-30 23:24:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:26,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-03-30 23:24:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 239 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-03-30 23:24:27,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:24:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763959154] [2023-03-30 23:24:27,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763959154] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:24:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239395962] [2023-03-30 23:24:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:24:27,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:24:27,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:24:27,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:24:27,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:24:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:24:27,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:24:27,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:24:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-03-30 23:24:27,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:24:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 246 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-03-30 23:24:27,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239395962] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:24:27,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:24:27,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:24:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296025819] [2023-03-30 23:24:27,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:24:27,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:24:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:24:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:24:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:24:27,611 INFO L87 Difference]: Start difference. First operand 70363 states and 93643 transitions. Second operand has 12 states, 12 states have (on average 35.666666666666664) internal successors, (428), 10 states have internal predecessors, (428), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9)