/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/Problem18_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:37:11,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:37:11,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:37:11,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 23:37:11,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 23:37:11,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 23:37:11,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 23:37:11,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 23:37:11,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 23:37:11,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 23:37:11,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 23:37:11,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 23:37:11,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 23:37:11,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 23:37:11,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 23:37:11,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 23:37:11,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 23:37:11,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 23:37:11,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 23:37:11,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 23:37:11,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 23:37:11,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 23:37:11,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 23:37:11,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 23:37:11,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 23:37:11,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 23:37:11,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 23:37:11,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 23:37:11,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 23:37:11,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 23:37:11,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 23:37:11,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 23:37:11,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 23:37:11,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 23:37:11,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 23:37:11,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 23:37:11,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 23:37:11,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 23:37:11,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 23:37:11,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 23:37:11,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 23:37:11,227 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 [2023-04-01 23:37:11,260 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:37:11,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:37:11,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:37:11,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:37:11,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:37:11,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:37:11,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:37:11,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:37:11,263 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:37:11,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:37:11,264 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:37:11,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:37:11,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:37:11,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:37:11,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:37:11,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:37:11,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:37:11,265 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:37:11,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:37:11,265 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:37:11,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:37:11,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:37:11,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:37:11,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:37:11,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:37:11,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:37:11,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:37:11,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:37:11,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:37:11,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:37:11,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:37:11,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:37:11,266 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:37:11,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:37:11,267 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:37:11,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:37:11,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:37:11,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:37:11,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:37:11,502 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:37:11,502 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:37:11,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label04.c [2023-04-01 23:37:12,568 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:37:12,939 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:37:12,940 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label04.c [2023-04-01 23:37:12,966 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9499d8dc7/ad1656aad1e049c2ba55b5297d6c4a4c/FLAGf2c57ea1d [2023-04-01 23:37:12,981 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9499d8dc7/ad1656aad1e049c2ba55b5297d6c4a4c [2023-04-01 23:37:12,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:37:12,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:37:12,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:37:12,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:37:12,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:37:12,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:37:12" (1/1) ... [2023-04-01 23:37:12,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a736d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:12, skipping insertion in model container [2023-04-01 23:37:12,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:37:12" (1/1) ... [2023-04-01 23:37:12,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:37:13,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:37:13,289 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/Problem18_label04.c[5507,5520] [2023-04-01 23:37:13,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:37:13,931 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:37:13,960 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/Problem18_label04.c[5507,5520] [2023-04-01 23:37:14,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:37:14,242 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:37:14,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14 WrapperNode [2023-04-01 23:37:14,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:37:14,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:37:14,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:37:14,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:37:14,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,406 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:37:14,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:37:14,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:37:14,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:37:14,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (1/1) ... [2023-04-01 23:37:14,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:37:14,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:37:14,467 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:37:14,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:37:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:37:14,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:37:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:37:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:37:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:37:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 23:37:14,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:37:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:37:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:37:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 23:37:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:37:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:37:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:37:14,573 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:37:14,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:37:17,242 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:37:17,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:37:17,254 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:37:17,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:37:17 BoogieIcfgContainer [2023-04-01 23:37:17,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:37:17,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:37:17,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:37:17,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:37:17,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:37:12" (1/3) ... [2023-04-01 23:37:17,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378be20a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:37:17, skipping insertion in model container [2023-04-01 23:37:17,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:37:14" (2/3) ... [2023-04-01 23:37:17,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378be20a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:37:17, skipping insertion in model container [2023-04-01 23:37:17,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:37:17" (3/3) ... [2023-04-01 23:37:17,263 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label04.c [2023-04-01 23:37:17,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:37:17,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:37:17,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:37:17,351 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;@14764e3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:37:17,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:37:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 23:37:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 23:37:17,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:37:17,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:37:17,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:37:17,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:37:17,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1050386059, now seen corresponding path program 1 times [2023-04-01 23:37:17,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:37:17,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755160988] [2023-04-01 23:37:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:17,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:37:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:17,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:37:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:37:17,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:37:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755160988] [2023-04-01 23:37:17,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755160988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:37:17,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:37:17,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:37:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444174529] [2023-04-01 23:37:17,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:37:17,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:37:17,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:37:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:37:17,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:37:17,905 INFO L87 Difference]: Start difference. First operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:37:22,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:37:22,218 INFO L93 Difference]: Finished difference Result 2270 states and 4349 transitions. [2023-04-01 23:37:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:37:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 58 [2023-04-01 23:37:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:37:22,251 INFO L225 Difference]: With dead ends: 2270 [2023-04-01 23:37:22,251 INFO L226 Difference]: Without dead ends: 1432 [2023-04-01 23:37:22,260 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 [2023-04-01 23:37:22,263 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2135 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3363 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2135 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 3363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:37:22,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2135 Valid, 37 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 3363 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 23:37:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-04-01 23:37:22,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1425. [2023-04-01 23:37:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1404 states have (on average 1.5690883190883191) internal successors, (2203), 1406 states have internal predecessors, (2203), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (18), 10 states have call predecessors, (18), 7 states have call successors, (18) [2023-04-01 23:37:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2229 transitions. [2023-04-01 23:37:22,378 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2229 transitions. Word has length 58 [2023-04-01 23:37:22,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:37:22,379 INFO L495 AbstractCegarLoop]: Abstraction has 1425 states and 2229 transitions. [2023-04-01 23:37:22,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:37:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2229 transitions. [2023-04-01 23:37:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 23:37:22,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:37:22,389 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, 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] [2023-04-01 23:37:22,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:37:22,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:37:22,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:37:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2016919090, now seen corresponding path program 1 times [2023-04-01 23:37:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:37:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098590137] [2023-04-01 23:37:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:37:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:22,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:37:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:22,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:37:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:37:22,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:37:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098590137] [2023-04-01 23:37:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098590137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:37:22,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:37:22,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:37:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007066308] [2023-04-01 23:37:22,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:37:22,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:37:22,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:37:22,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:37:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:37:22,857 INFO L87 Difference]: Start difference. First operand 1425 states and 2229 transitions. Second operand has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:37:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:37:27,617 INFO L93 Difference]: Finished difference Result 4355 states and 6855 transitions. [2023-04-01 23:37:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:37:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 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 128 [2023-04-01 23:37:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:37:27,630 INFO L225 Difference]: With dead ends: 4355 [2023-04-01 23:37:27,630 INFO L226 Difference]: Without dead ends: 2936 [2023-04-01 23:37:27,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:37:27,634 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3812 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 4845 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 5671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 4845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:37:27,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3812 Valid, 123 Invalid, 5671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 4845 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 23:37:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2023-04-01 23:37:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2886. [2023-04-01 23:37:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2831 states have (on average 1.3733663016601907) internal successors, (3888), 2842 states have internal predecessors, (3888), 14 states have call successors, (14), 14 states have call predecessors, (14), 40 states have return successors, (85), 29 states have call predecessors, (85), 13 states have call successors, (85) [2023-04-01 23:37:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 3987 transitions. [2023-04-01 23:37:27,722 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 3987 transitions. Word has length 128 [2023-04-01 23:37:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:37:27,723 INFO L495 AbstractCegarLoop]: Abstraction has 2886 states and 3987 transitions. [2023-04-01 23:37:27,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:37:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 3987 transitions. [2023-04-01 23:37:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-04-01 23:37:27,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:37:27,726 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:37:27,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:37:27,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:37:27,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:37:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1823384490, now seen corresponding path program 1 times [2023-04-01 23:37:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:37:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927383277] [2023-04-01 23:37:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:37:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:27,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:37:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:28,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:37:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:37:28,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:37:28,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927383277] [2023-04-01 23:37:28,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927383277] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:37:28,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:37:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:37:28,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533831834] [2023-04-01 23:37:28,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:37:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 23:37:28,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:37:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 23:37:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:37:28,154 INFO L87 Difference]: Start difference. First operand 2886 states and 3987 transitions. Second operand has 8 states, 7 states have (on average 26.285714285714285) internal successors, (184), 5 states have internal predecessors, (184), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:37:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:37:34,251 INFO L93 Difference]: Finished difference Result 11696 states and 16595 transitions. [2023-04-01 23:37:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 23:37:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 26.285714285714285) internal successors, (184), 5 states have internal predecessors, (184), 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 190 [2023-04-01 23:37:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:37:34,294 INFO L225 Difference]: With dead ends: 11696 [2023-04-01 23:37:34,295 INFO L226 Difference]: Without dead ends: 8816 [2023-04-01 23:37:34,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:37:34,306 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3829 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7432 mSolverCounterSat, 1568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 9000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1568 IncrementalHoareTripleChecker+Valid, 7432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:37:34,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 118 Invalid, 9000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1568 Valid, 7432 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-04-01 23:37:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2023-04-01 23:37:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 8757. [2023-04-01 23:37:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8556 states have (on average 1.2331697054698456) internal successors, (10551), 8606 states have internal predecessors, (10551), 38 states have call successors, (38), 38 states have call predecessors, (38), 162 states have return successors, (568), 112 states have call predecessors, (568), 37 states have call successors, (568) [2023-04-01 23:37:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 11157 transitions. [2023-04-01 23:37:34,548 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 11157 transitions. Word has length 190 [2023-04-01 23:37:34,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:37:34,548 INFO L495 AbstractCegarLoop]: Abstraction has 8757 states and 11157 transitions. [2023-04-01 23:37:34,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 26.285714285714285) internal successors, (184), 5 states have internal predecessors, (184), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:37:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 11157 transitions. [2023-04-01 23:37:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-04-01 23:37:34,554 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:37:34,554 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, 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, 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] [2023-04-01 23:37:34,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:37:34,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:37:34,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:37:34,555 INFO L85 PathProgramCache]: Analyzing trace with hash -31293186, now seen corresponding path program 1 times [2023-04-01 23:37:34,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:37:34,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468026716] [2023-04-01 23:37:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:34,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:37:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:34,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:37:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:34,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:37:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:34,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-04-01 23:37:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:37:34,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:37:34,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468026716] [2023-04-01 23:37:34,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468026716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:37:34,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500688113] [2023-04-01 23:37:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:34,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:34,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:37:34,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:37:34,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:37:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:35,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:37:35,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:37:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:37:35,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:37:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:37:35,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500688113] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:37:35,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:37:35,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:37:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371659252] [2023-04-01 23:37:35,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:37:35,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:37:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:37:35,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:37:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:37:35,524 INFO L87 Difference]: Start difference. First operand 8757 states and 11157 transitions. Second operand has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 9 states have internal predecessors, (387), 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) [2023-04-01 23:37:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:37:42,573 INFO L93 Difference]: Finished difference Result 23722 states and 31240 transitions. [2023-04-01 23:37:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 23:37:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 9 states have internal predecessors, (387), 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 253 [2023-04-01 23:37:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:37:42,628 INFO L225 Difference]: With dead ends: 23722 [2023-04-01 23:37:42,628 INFO L226 Difference]: Without dead ends: 14114 [2023-04-01 23:37:42,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 510 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:37:42,657 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3198 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 12132 mSolverCounterSat, 1889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3201 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 14021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1889 IncrementalHoareTripleChecker+Valid, 12132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:37:42,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3201 Valid, 224 Invalid, 14021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1889 Valid, 12132 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 23:37:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14114 states. [2023-04-01 23:37:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14114 to 12499. [2023-04-01 23:37:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12499 states, 12177 states have (on average 1.119076948345241) internal successors, (13627), 12268 states have internal predecessors, (13627), 53 states have call successors, (53), 53 states have call predecessors, (53), 268 states have return successors, (809), 177 states have call predecessors, (809), 52 states have call successors, (809) [2023-04-01 23:37:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12499 states to 12499 states and 14489 transitions. [2023-04-01 23:37:43,040 INFO L78 Accepts]: Start accepts. Automaton has 12499 states and 14489 transitions. Word has length 253 [2023-04-01 23:37:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:37:43,040 INFO L495 AbstractCegarLoop]: Abstraction has 12499 states and 14489 transitions. [2023-04-01 23:37:43,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 9 states have internal predecessors, (387), 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) [2023-04-01 23:37:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 12499 states and 14489 transitions. [2023-04-01 23:37:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2023-04-01 23:37:43,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:37:43,048 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, 4, 4, 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, 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] [2023-04-01 23:37:43,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:37:43,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:43,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:37:43,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:37:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1291049968, now seen corresponding path program 1 times [2023-04-01 23:37:43,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:37:43,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886294442] [2023-04-01 23:37:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:37:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:43,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:37:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:43,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:37:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:43,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-04-01 23:37:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:43,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-04-01 23:37:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 292 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 23:37:43,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:37:43,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886294442] [2023-04-01 23:37:43,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886294442] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:37:43,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480861368] [2023-04-01 23:37:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:43,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:43,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:37:43,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:37:43,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:37:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:43,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:37:43,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:37:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 294 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-04-01 23:37:43,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:37:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 294 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-04-01 23:37:44,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480861368] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:37:44,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:37:44,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:37:44,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450413073] [2023-04-01 23:37:44,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:37:44,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:37:44,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:37:44,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:37:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:37:44,126 INFO L87 Difference]: Start difference. First operand 12499 states and 14489 transitions. Second operand has 11 states, 11 states have (on average 34.63636363636363) internal successors, (381), 9 states have internal predecessors, (381), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:37:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:37:48,990 INFO L93 Difference]: Finished difference Result 28580 states and 32866 transitions. [2023-04-01 23:37:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:37:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 34.63636363636363) internal successors, (381), 9 states have internal predecessors, (381), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 356 [2023-04-01 23:37:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:37:49,036 INFO L225 Difference]: With dead ends: 28580 [2023-04-01 23:37:49,037 INFO L226 Difference]: Without dead ends: 16087 [2023-04-01 23:37:49,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 722 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-04-01 23:37:49,059 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 3983 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 7745 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3989 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 8905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 7745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:37:49,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3989 Valid, 161 Invalid, 8905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 7745 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 23:37:49,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16087 states. [2023-04-01 23:37:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16087 to 12499. [2023-04-01 23:37:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12499 states, 12177 states have (on average 1.0774410774410774) internal successors, (13120), 12268 states have internal predecessors, (13120), 53 states have call successors, (53), 53 states have call predecessors, (53), 268 states have return successors, (548), 177 states have call predecessors, (548), 52 states have call successors, (548) [2023-04-01 23:37:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12499 states to 12499 states and 13721 transitions. [2023-04-01 23:37:49,298 INFO L78 Accepts]: Start accepts. Automaton has 12499 states and 13721 transitions. Word has length 356 [2023-04-01 23:37:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:37:49,300 INFO L495 AbstractCegarLoop]: Abstraction has 12499 states and 13721 transitions. [2023-04-01 23:37:49,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.63636363636363) internal successors, (381), 9 states have internal predecessors, (381), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:37:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12499 states and 13721 transitions. [2023-04-01 23:37:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-04-01 23:37:49,305 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:37:49,305 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, 4, 4, 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, 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] [2023-04-01 23:37:49,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:37:49,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:49,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:37:49,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:37:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash 733608643, now seen corresponding path program 1 times [2023-04-01 23:37:49,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:37:49,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018774406] [2023-04-01 23:37:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:49,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:37:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:37:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:49,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:37:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:49,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-04-01 23:37:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:49,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-04-01 23:37:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 23:37:50,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:37:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018774406] [2023-04-01 23:37:50,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018774406] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:37:50,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512606682] [2023-04-01 23:37:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:50,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:50,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:37:50,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:37:50,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:37:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:50,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:37:50,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:37:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-04-01 23:37:50,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:37:50,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512606682] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:37:50,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:37:50,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 23:37:50,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719248710] [2023-04-01 23:37:50,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:37:50,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:37:50,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:37:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:37:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 23:37:50,587 INFO L87 Difference]: Start difference. First operand 12499 states and 13721 transitions. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:37:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:37:53,337 INFO L93 Difference]: Finished difference Result 29403 states and 32134 transitions. [2023-04-01 23:37:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:37:53,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 373 [2023-04-01 23:37:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:37:53,379 INFO L225 Difference]: With dead ends: 29403 [2023-04-01 23:37:53,380 INFO L226 Difference]: Without dead ends: 16910 [2023-04-01 23:37:53,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:37:53,402 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1905 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 3714 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1905 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 4080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 3714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:37:53,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1905 Valid, 117 Invalid, 4080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 3714 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 23:37:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16910 states. [2023-04-01 23:37:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16910 to 13940. [2023-04-01 23:37:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13940 states, 13591 states have (on average 1.0729894783312486) internal successors, (14583), 13690 states have internal predecessors, (14583), 59 states have call successors, (59), 59 states have call predecessors, (59), 289 states have return successors, (610), 190 states have call predecessors, (610), 58 states have call successors, (610) [2023-04-01 23:37:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13940 states to 13940 states and 15252 transitions. [2023-04-01 23:37:53,641 INFO L78 Accepts]: Start accepts. Automaton has 13940 states and 15252 transitions. Word has length 373 [2023-04-01 23:37:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:37:53,641 INFO L495 AbstractCegarLoop]: Abstraction has 13940 states and 15252 transitions. [2023-04-01 23:37:53,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:37:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 13940 states and 15252 transitions. [2023-04-01 23:37:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-04-01 23:37:53,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:37:53,648 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:37:53,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:37:53,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:53,857 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:37:53,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:37:53,858 INFO L85 PathProgramCache]: Analyzing trace with hash -203360234, now seen corresponding path program 1 times [2023-04-01 23:37:53,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:37:53,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885393748] [2023-04-01 23:37:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:53,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:37:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:54,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:37:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:54,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:37:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:54,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:37:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:54,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2023-04-01 23:37:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:37:54,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:37:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885393748] [2023-04-01 23:37:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885393748] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:37:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278025117] [2023-04-01 23:37:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:54,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:54,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:37:54,529 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) [2023-04-01 23:37:54,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:37:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:54,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:37:54,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:37:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-04-01 23:37:54,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:37:54,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278025117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:37:54,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:37:54,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2023-04-01 23:37:54,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857574117] [2023-04-01 23:37:54,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:37:54,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:37:54,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:37:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:37:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:37:54,752 INFO L87 Difference]: Start difference. First operand 13940 states and 15252 transitions. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:37:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:37:56,738 INFO L93 Difference]: Finished difference Result 30719 states and 34042 transitions. [2023-04-01 23:37:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:37:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 455 [2023-04-01 23:37:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:37:56,788 INFO L225 Difference]: With dead ends: 30719 [2023-04-01 23:37:56,789 INFO L226 Difference]: Without dead ends: 16785 [2023-04-01 23:37:56,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:37:56,814 INFO L413 NwaCegarLoop]: 1145 mSDtfsCounter, 649 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:37:56,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1171 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 23:37:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16785 states. [2023-04-01 23:37:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16785 to 16772. [2023-04-01 23:37:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16772 states, 16389 states have (on average 1.0695588504484714) internal successors, (17529), 16494 states have internal predecessors, (17529), 71 states have call successors, (71), 71 states have call predecessors, (71), 311 states have return successors, (720), 206 states have call predecessors, (720), 70 states have call successors, (720) [2023-04-01 23:37:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16772 states to 16772 states and 18320 transitions. [2023-04-01 23:37:57,053 INFO L78 Accepts]: Start accepts. Automaton has 16772 states and 18320 transitions. Word has length 455 [2023-04-01 23:37:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:37:57,054 INFO L495 AbstractCegarLoop]: Abstraction has 16772 states and 18320 transitions. [2023-04-01 23:37:57,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:37:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 16772 states and 18320 transitions. [2023-04-01 23:37:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-04-01 23:37:57,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:37:57,061 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:37:57,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:37:57,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:57,267 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:37:57,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:37:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2145865889, now seen corresponding path program 1 times [2023-04-01 23:37:57,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:37:57,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794745442] [2023-04-01 23:37:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:57,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:37:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:57,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:37:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:57,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:37:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:58,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:37:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:58,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2023-04-01 23:37:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 147 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:37:58,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:37:58,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794745442] [2023-04-01 23:37:58,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794745442] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:37:58,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687418136] [2023-04-01 23:37:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:37:58,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:37:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:37:58,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:37:58,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:37:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:37:58,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:37:58,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:37:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 23:37:58,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:37:58,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687418136] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:37:58,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:37:58,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:37:58,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438116648] [2023-04-01 23:37:58,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:37:58,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:37:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:37:58,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:37:58,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:37:58,851 INFO L87 Difference]: Start difference. First operand 16772 states and 18320 transitions. Second operand has 5 states, 5 states have (on average 80.4) internal successors, (402), 4 states have internal predecessors, (402), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:38:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:38:01,824 INFO L93 Difference]: Finished difference Result 45995 states and 51263 transitions. [2023-04-01 23:38:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:38:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 80.4) internal successors, (402), 4 states have internal predecessors, (402), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 462 [2023-04-01 23:38:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:38:01,903 INFO L225 Difference]: With dead ends: 45995 [2023-04-01 23:38:01,903 INFO L226 Difference]: Without dead ends: 29229 [2023-04-01 23:38:01,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:38:01,931 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1543 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 3934 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 4819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 3934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:38:01,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1543 Valid, 113 Invalid, 4819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 3934 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 23:38:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29229 states. [2023-04-01 23:38:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29229 to 27665. [2023-04-01 23:38:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27665 states, 27043 states have (on average 1.0647487334985024) internal successors, (28794), 27232 states have internal predecessors, (28794), 116 states have call successors, (116), 116 states have call predecessors, (116), 505 states have return successors, (1620), 316 states have call predecessors, (1620), 115 states have call successors, (1620) [2023-04-01 23:38:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27665 states to 27665 states and 30530 transitions. [2023-04-01 23:38:02,406 INFO L78 Accepts]: Start accepts. Automaton has 27665 states and 30530 transitions. Word has length 462 [2023-04-01 23:38:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:38:02,407 INFO L495 AbstractCegarLoop]: Abstraction has 27665 states and 30530 transitions. [2023-04-01 23:38:02,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.4) internal successors, (402), 4 states have internal predecessors, (402), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:38:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 27665 states and 30530 transitions. [2023-04-01 23:38:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2023-04-01 23:38:02,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:38:02,434 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, 4, 4, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:38:02,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:38:02,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:38:02,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:38:02,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:38:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash 907041147, now seen corresponding path program 1 times [2023-04-01 23:38:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:38:02,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974271363] [2023-04-01 23:38:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:38:02,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:38:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:03,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:38:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:03,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:38:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:03,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:38:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:04,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:38:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:04,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:38:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:04,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:38:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:04,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:38:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 299 proven. 52 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2023-04-01 23:38:04,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:38:04,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974271363] [2023-04-01 23:38:04,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974271363] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:38:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283686222] [2023-04-01 23:38:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:38:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:38:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:38:04,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:38:04,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:38:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:04,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:38:04,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:38:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 351 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-04-01 23:38:05,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:38:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 351 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-04-01 23:38:07,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283686222] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:38:07,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:38:07,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 23:38:07,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999609075] [2023-04-01 23:38:07,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:38:07,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:38:07,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:38:07,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:38:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:38:07,041 INFO L87 Difference]: Start difference. First operand 27665 states and 30530 transitions. Second operand has 13 states, 13 states have (on average 71.3076923076923) internal successors, (927), 11 states have internal predecessors, (927), 6 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 23:38:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:38:21,765 INFO L93 Difference]: Finished difference Result 104610 states and 119469 transitions. [2023-04-01 23:38:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-04-01 23:38:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 71.3076923076923) internal successors, (927), 11 states have internal predecessors, (927), 6 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 989 [2023-04-01 23:38:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:38:22,111 INFO L225 Difference]: With dead ends: 104610 [2023-04-01 23:38:22,112 INFO L226 Difference]: Without dead ends: 75401 [2023-04-01 23:38:22,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2123 GetRequests, 2048 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1026, Invalid=4674, Unknown=0, NotChecked=0, Total=5700 [2023-04-01 23:38:22,147 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 13540 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 17139 mSolverCounterSat, 4006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13540 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 21145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4006 IncrementalHoareTripleChecker+Valid, 17139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:38:22,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13540 Valid, 491 Invalid, 21145 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4006 Valid, 17139 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2023-04-01 23:38:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75401 states. [2023-04-01 23:38:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75401 to 69699. [2023-04-01 23:38:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69699 states, 68473 states have (on average 1.0492310837848495) internal successors, (71844), 68796 states have internal predecessors, (71844), 293 states have call successors, (293), 293 states have call predecessors, (293), 932 states have return successors, (4560), 609 states have call predecessors, (4560), 292 states have call successors, (4560) [2023-04-01 23:38:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69699 states to 69699 states and 76697 transitions. [2023-04-01 23:38:23,699 INFO L78 Accepts]: Start accepts. Automaton has 69699 states and 76697 transitions. Word has length 989 [2023-04-01 23:38:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:38:23,700 INFO L495 AbstractCegarLoop]: Abstraction has 69699 states and 76697 transitions. [2023-04-01 23:38:23,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 71.3076923076923) internal successors, (927), 11 states have internal predecessors, (927), 6 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 23:38:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 69699 states and 76697 transitions. [2023-04-01 23:38:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2023-04-01 23:38:23,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:38:23,719 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, 4, 4, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:38:23,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:38:23,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:38:23,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:38:23,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:38:23,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1618101828, now seen corresponding path program 1 times [2023-04-01 23:38:23,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:38:23,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753344252] [2023-04-01 23:38:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:38:23,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:38:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:25,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:38:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:25,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:38:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:25,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:38:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:25,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:38:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:25,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:38:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:25,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:38:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:25,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:38:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 524 proven. 8 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-04-01 23:38:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:38:25,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753344252] [2023-04-01 23:38:25,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753344252] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:38:25,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074395519] [2023-04-01 23:38:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:38:25,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:38:25,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:38:25,722 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:38:25,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:38:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:26,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:38:26,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:38:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 529 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-04-01 23:38:26,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:38:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 529 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-04-01 23:38:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074395519] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:38:26,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:38:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2023-04-01 23:38:26,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096499751] [2023-04-01 23:38:26,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:38:26,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:38:26,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:38:26,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:38:26,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:38:26,780 INFO L87 Difference]: Start difference. First operand 69699 states and 76697 transitions. Second operand has 13 states, 13 states have (on average 87.38461538461539) internal successors, (1136), 11 states have internal predecessors, (1136), 5 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 23:38:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:38:36,114 INFO L93 Difference]: Finished difference Result 161492 states and 178109 transitions. [2023-04-01 23:38:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 23:38:36,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 87.38461538461539) internal successors, (1136), 11 states have internal predecessors, (1136), 5 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 1078 [2023-04-01 23:38:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:38:36,337 INFO L225 Difference]: With dead ends: 161492 [2023-04-01 23:38:36,337 INFO L226 Difference]: Without dead ends: 89640 [2023-04-01 23:38:36,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2216 GetRequests, 2183 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 23:38:36,414 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 13320 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 12833 mSolverCounterSat, 3062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13320 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 15895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3062 IncrementalHoareTripleChecker+Valid, 12833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:38:36,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13320 Valid, 211 Invalid, 15895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3062 Valid, 12833 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-04-01 23:38:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89640 states. [2023-04-01 23:38:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89640 to 83212. [2023-04-01 23:38:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83212 states, 81520 states have (on average 1.039106967615309) internal successors, (84708), 82040 states have internal predecessors, (84708), 347 states have call successors, (347), 347 states have call predecessors, (347), 1344 states have return successors, (4579), 824 states have call predecessors, (4579), 346 states have call successors, (4579) [2023-04-01 23:38:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83212 states to 83212 states and 89634 transitions. [2023-04-01 23:38:38,367 INFO L78 Accepts]: Start accepts. Automaton has 83212 states and 89634 transitions. Word has length 1078 [2023-04-01 23:38:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:38:38,369 INFO L495 AbstractCegarLoop]: Abstraction has 83212 states and 89634 transitions. [2023-04-01 23:38:38,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 87.38461538461539) internal successors, (1136), 11 states have internal predecessors, (1136), 5 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 23:38:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 83212 states and 89634 transitions. [2023-04-01 23:38:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1086 [2023-04-01 23:38:38,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:38:38,387 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, 4, 4, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:38:38,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:38:38,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:38:38,594 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:38:38,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:38:38,594 INFO L85 PathProgramCache]: Analyzing trace with hash -803462416, now seen corresponding path program 1 times [2023-04-01 23:38:38,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:38:38,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43283223] [2023-04-01 23:38:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:38:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:38:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:38:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:38:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:38:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:38:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:38:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:38:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 849 [2023-04-01 23:38:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 156 proven. 3 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-04-01 23:38:39,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:38:39,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43283223] [2023-04-01 23:38:39,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43283223] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:38:39,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578312270] [2023-04-01 23:38:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:38:39,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:38:39,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:38:39,661 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:38:39,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:38:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:39,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:38:39,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:38:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-04-01 23:38:40,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:38:40,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578312270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:38:40,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:38:40,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:38:40,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492570933] [2023-04-01 23:38:40,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:38:40,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:38:40,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:38:40,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:38:40,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:38:40,019 INFO L87 Difference]: Start difference. First operand 83212 states and 89634 transitions. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 23:38:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:38:42,353 INFO L93 Difference]: Finished difference Result 174884 states and 188444 transitions. [2023-04-01 23:38:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:38:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 1085 [2023-04-01 23:38:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:38:42,742 INFO L225 Difference]: With dead ends: 174884 [2023-04-01 23:38:42,742 INFO L226 Difference]: Without dead ends: 90793 [2023-04-01 23:38:42,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1103 GetRequests, 1100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:38:42,809 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 667 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:38:42,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 435 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 23:38:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90793 states. [2023-04-01 23:38:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90793 to 88685. [2023-04-01 23:38:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88685 states, 86999 states have (on average 1.03227623306015) internal successors, (89807), 87500 states have internal predecessors, (89807), 371 states have call successors, (371), 371 states have call predecessors, (371), 1314 states have return successors, (4492), 813 states have call predecessors, (4492), 370 states have call successors, (4492) [2023-04-01 23:38:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88685 states to 88685 states and 94670 transitions. [2023-04-01 23:38:44,372 INFO L78 Accepts]: Start accepts. Automaton has 88685 states and 94670 transitions. Word has length 1085 [2023-04-01 23:38:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:38:44,373 INFO L495 AbstractCegarLoop]: Abstraction has 88685 states and 94670 transitions. [2023-04-01 23:38:44,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 23:38:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 88685 states and 94670 transitions. [2023-04-01 23:38:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1133 [2023-04-01 23:38:44,385 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:38:44,386 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:38:44,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:38:44,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 23:38:44,592 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:38:44,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:38:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1549306105, now seen corresponding path program 1 times [2023-04-01 23:38:44,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:38:44,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793535332] [2023-04-01 23:38:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:38:44,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:38:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:45,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:38:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:45,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:38:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:45,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:38:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:45,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:38:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:45,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:38:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:45,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:38:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:45,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:38:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:46,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 985 [2023-04-01 23:38:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 445 proven. 53 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-04-01 23:38:46,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:38:46,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793535332] [2023-04-01 23:38:46,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793535332] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:38:46,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023855808] [2023-04-01 23:38:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:38:46,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:38:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:38:46,101 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:38:46,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:38:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:38:46,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:38:46,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:38:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 499 proven. 2 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2023-04-01 23:38:46,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:38:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 499 proven. 2 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2023-04-01 23:38:47,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023855808] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:38:47,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:38:47,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 23:38:47,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813089794] [2023-04-01 23:38:47,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:38:47,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:38:47,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:38:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:38:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:38:47,986 INFO L87 Difference]: Start difference. First operand 88685 states and 94670 transitions. Second operand has 13 states, 13 states have (on average 70.92307692307692) internal successors, (922), 11 states have internal predecessors, (922), 6 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 23:38:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:38:58,664 INFO L93 Difference]: Finished difference Result 208825 states and 224473 transitions. [2023-04-01 23:38:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 23:38:58,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 70.92307692307692) internal successors, (922), 11 states have internal predecessors, (922), 6 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 1132 [2023-04-01 23:38:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:38:59,125 INFO L225 Difference]: With dead ends: 208825 [2023-04-01 23:38:59,125 INFO L226 Difference]: Without dead ends: 120079 [2023-04-01 23:38:59,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2358 GetRequests, 2310 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1887, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 23:38:59,217 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 6875 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 15980 mSolverCounterSat, 1525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6875 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 17505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1525 IncrementalHoareTripleChecker+Valid, 15980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:38:59,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6875 Valid, 389 Invalid, 17505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1525 Valid, 15980 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2023-04-01 23:38:59,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120079 states. [2023-04-01 23:39:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120079 to 113609. [2023-04-01 23:39:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113609 states, 111564 states have (on average 1.031909935104514) internal successors, (115124), 112158 states have internal predecessors, (115124), 476 states have call successors, (476), 476 states have call predecessors, (476), 1568 states have return successors, (6117), 974 states have call predecessors, (6117), 475 states have call successors, (6117) [2023-04-01 23:39:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113609 states to 113609 states and 121717 transitions. [2023-04-01 23:39:00,941 INFO L78 Accepts]: Start accepts. Automaton has 113609 states and 121717 transitions. Word has length 1132 [2023-04-01 23:39:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:39:00,942 INFO L495 AbstractCegarLoop]: Abstraction has 113609 states and 121717 transitions. [2023-04-01 23:39:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 70.92307692307692) internal successors, (922), 11 states have internal predecessors, (922), 6 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 23:39:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 113609 states and 121717 transitions. [2023-04-01 23:39:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1230 [2023-04-01 23:39:00,955 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:39:00,956 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:39:00,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 23:39:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:39:01,162 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:39:01,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:39:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash 156084033, now seen corresponding path program 1 times [2023-04-01 23:39:01,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:39:01,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489384565] [2023-04-01 23:39:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:39:01,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:39:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:39:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:39:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:39:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:39:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:39:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 985 [2023-04-01 23:39:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1061 [2023-04-01 23:39:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 636 proven. 54 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2023-04-01 23:39:02,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:39:02,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489384565] [2023-04-01 23:39:02,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489384565] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:39:02,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425168109] [2023-04-01 23:39:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:39:02,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:39:02,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:39:02,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:39:02,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:39:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:02,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:39:02,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:39:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 644 proven. 50 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 23:39:02,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:39:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 692 proven. 2 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 23:39:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425168109] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:39:03,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:39:03,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2023-04-01 23:39:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720733355] [2023-04-01 23:39:03,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:39:03,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 23:39:03,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:39:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 23:39:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:39:03,301 INFO L87 Difference]: Start difference. First operand 113609 states and 121717 transitions. Second operand has 13 states, 13 states have (on average 75.46153846153847) internal successors, (981), 11 states have internal predecessors, (981), 5 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 23:39:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:39:10,725 INFO L93 Difference]: Finished difference Result 261378 states and 282554 transitions. [2023-04-01 23:39:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:39:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 75.46153846153847) internal successors, (981), 11 states have internal predecessors, (981), 5 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 1229 [2023-04-01 23:39:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:39:11,030 INFO L225 Difference]: With dead ends: 261378 [2023-04-01 23:39:11,030 INFO L226 Difference]: Without dead ends: 145955 [2023-04-01 23:39:11,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2508 GetRequests, 2483 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:39:11,231 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12784 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 7321 mSolverCounterSat, 2084 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12784 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 9405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2084 IncrementalHoareTripleChecker+Valid, 7321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:39:11,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12784 Valid, 133 Invalid, 9405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2084 Valid, 7321 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 23:39:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145955 states. [2023-04-01 23:39:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145955 to 136050. [2023-04-01 23:39:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136050 states, 133816 states have (on average 1.0328062414061099) internal successors, (138206), 134424 states have internal predecessors, (138206), 572 states have call successors, (572), 572 states have call predecessors, (572), 1661 states have return successors, (7937), 1053 states have call predecessors, (7937), 571 states have call successors, (7937) [2023-04-01 23:39:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136050 states to 136050 states and 146715 transitions. [2023-04-01 23:39:13,239 INFO L78 Accepts]: Start accepts. Automaton has 136050 states and 146715 transitions. Word has length 1229 [2023-04-01 23:39:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:39:13,240 INFO L495 AbstractCegarLoop]: Abstraction has 136050 states and 146715 transitions. [2023-04-01 23:39:13,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 75.46153846153847) internal successors, (981), 11 states have internal predecessors, (981), 5 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 23:39:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 136050 states and 146715 transitions. [2023-04-01 23:39:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1255 [2023-04-01 23:39:13,255 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:39:13,256 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:39:13,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:39:13,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:39:13,462 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:39:13,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:39:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash 983984696, now seen corresponding path program 1 times [2023-04-01 23:39:13,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:39:13,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194808292] [2023-04-01 23:39:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:39:13,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:39:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:39:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:39:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:39:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:39:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:39:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 985 [2023-04-01 23:39:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1096 [2023-04-01 23:39:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1613 backedges. 262 proven. 5 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2023-04-01 23:39:14,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:39:14,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194808292] [2023-04-01 23:39:14,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194808292] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:39:14,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211201121] [2023-04-01 23:39:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:39:14,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:39:14,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:39:14,481 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:39:14,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:39:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:14,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:39:14,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:39:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1613 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2023-04-01 23:39:14,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:39:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211201121] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:39:14,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:39:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:39:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184531404] [2023-04-01 23:39:14,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:39:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:39:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:39:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:39:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:39:14,835 INFO L87 Difference]: Start difference. First operand 136050 states and 146715 transitions. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 23:39:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:39:17,425 INFO L93 Difference]: Finished difference Result 269956 states and 291140 transitions. [2023-04-01 23:39:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:39:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 1254 [2023-04-01 23:39:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:39:17,740 INFO L225 Difference]: With dead ends: 269956 [2023-04-01 23:39:17,740 INFO L226 Difference]: Without dead ends: 133912 [2023-04-01 23:39:17,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1276 GetRequests, 1272 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:39:17,841 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 754 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:39:17,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 797 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 23:39:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133912 states. [2023-04-01 23:39:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133912 to 133210. [2023-04-01 23:39:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133210 states, 131013 states have (on average 1.0305542198102478) internal successors, (135016), 131614 states have internal predecessors, (135016), 560 states have call successors, (560), 560 states have call predecessors, (560), 1636 states have return successors, (7299), 1035 states have call predecessors, (7299), 559 states have call successors, (7299) [2023-04-01 23:39:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133210 states to 133210 states and 142875 transitions. [2023-04-01 23:39:19,937 INFO L78 Accepts]: Start accepts. Automaton has 133210 states and 142875 transitions. Word has length 1254 [2023-04-01 23:39:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:39:19,938 INFO L495 AbstractCegarLoop]: Abstraction has 133210 states and 142875 transitions. [2023-04-01 23:39:19,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 23:39:19,938 INFO L276 IsEmpty]: Start isEmpty. Operand 133210 states and 142875 transitions. [2023-04-01 23:39:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1449 [2023-04-01 23:39:19,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:39:19,970 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:39:19,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:39:20,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:39:20,179 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:39:20,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:39:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash 654888679, now seen corresponding path program 1 times [2023-04-01 23:39:20,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:39:20,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635644874] [2023-04-01 23:39:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:39:20,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:39:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:39:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:20,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:39:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:39:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:39:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:39:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 985 [2023-04-01 23:39:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1096 [2023-04-01 23:39:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1204 [2023-04-01 23:39:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2414 backedges. 1061 proven. 2 refuted. 0 times theorem prover too weak. 1351 trivial. 0 not checked. [2023-04-01 23:39:21,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:39:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635644874] [2023-04-01 23:39:21,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635644874] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:39:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206184781] [2023-04-01 23:39:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:39:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:39:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:39:21,366 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:39:21,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:39:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:21,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:39:21,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:39:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2414 backedges. 1066 proven. 2 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2023-04-01 23:39:21,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:39:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2414 backedges. 1066 proven. 2 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2023-04-01 23:39:22,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206184781] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:39:22,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:39:22,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:39:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196821456] [2023-04-01 23:39:22,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:39:22,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:39:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:39:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:39:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:39:22,470 INFO L87 Difference]: Start difference. First operand 133210 states and 142875 transitions. Second operand has 11 states, 11 states have (on average 105.36363636363636) internal successors, (1159), 9 states have internal predecessors, (1159), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 23:39:28,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:39:28,706 INFO L93 Difference]: Finished difference Result 293994 states and 317494 transitions. [2023-04-01 23:39:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:39:28,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 105.36363636363636) internal successors, (1159), 9 states have internal predecessors, (1159), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 1448 [2023-04-01 23:39:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:39:29,235 INFO L225 Difference]: With dead ends: 293994 [2023-04-01 23:39:29,235 INFO L226 Difference]: Without dead ends: 155789 [2023-04-01 23:39:29,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2948 GetRequests, 2923 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-01 23:39:29,323 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 4923 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 7788 mSolverCounterSat, 1153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4929 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 8941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 7788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:39:29,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4929 Valid, 186 Invalid, 8941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1153 Valid, 7788 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-04-01 23:39:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155789 states. [2023-04-01 23:39:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155789 to 143032. [2023-04-01 23:39:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143032 states, 140751 states have (on average 1.0262946622048867) internal successors, (144452), 141358 states have internal predecessors, (144452), 602 states have call successors, (602), 602 states have call predecessors, (602), 1678 states have return successors, (6910), 1071 states have call predecessors, (6910), 601 states have call successors, (6910) [2023-04-01 23:39:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143032 states to 143032 states and 151964 transitions. [2023-04-01 23:39:31,650 INFO L78 Accepts]: Start accepts. Automaton has 143032 states and 151964 transitions. Word has length 1448 [2023-04-01 23:39:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:39:31,651 INFO L495 AbstractCegarLoop]: Abstraction has 143032 states and 151964 transitions. [2023-04-01 23:39:31,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.36363636363636) internal successors, (1159), 9 states have internal predecessors, (1159), 4 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-01 23:39:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 143032 states and 151964 transitions. [2023-04-01 23:39:31,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1498 [2023-04-01 23:39:31,695 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:39:31,695 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:39:31,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 23:39:31,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 23:39:31,901 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:39:31,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:39:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash -933195186, now seen corresponding path program 1 times [2023-04-01 23:39:31,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:39:31,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927506603] [2023-04-01 23:39:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:39:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:39:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:39:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:35,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:39:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:35,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:35,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:39:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:35,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:39:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:35,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:35,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:39:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:35,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 985 [2023-04-01 23:39:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:36,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:39:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:36,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1345 [2023-04-01 23:39:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 1232 proven. 244 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-04-01 23:39:36,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:39:36,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927506603] [2023-04-01 23:39:36,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927506603] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:39:36,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122506126] [2023-04-01 23:39:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:39:36,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:39:36,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:39:36,645 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:39:36,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 23:39:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:39:37,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 23:39:37,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:39:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 1273 proven. 206 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2023-04-01 23:39:37,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:39:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 1377 proven. 102 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2023-04-01 23:39:39,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122506126] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:39:39,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:39:39,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 24 [2023-04-01 23:39:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740978821] [2023-04-01 23:39:39,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:39:39,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 23:39:39,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:39:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 23:39:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-04-01 23:39:39,396 INFO L87 Difference]: Start difference. First operand 143032 states and 151964 transitions. Second operand has 24 states, 24 states have (on average 80.08333333333333) internal successors, (1922), 22 states have internal predecessors, (1922), 13 states have call successors, (22), 10 states have call predecessors, (22), 11 states have return successors, (20), 13 states have call predecessors, (20), 11 states have call successors, (20) [2023-04-01 23:40:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:40:09,305 INFO L93 Difference]: Finished difference Result 328657 states and 349540 transitions. [2023-04-01 23:40:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-04-01 23:40:09,305 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 80.08333333333333) internal successors, (1922), 22 states have internal predecessors, (1922), 13 states have call successors, (22), 10 states have call predecessors, (22), 11 states have return successors, (20), 13 states have call predecessors, (20), 11 states have call successors, (20) Word has length 1497 [2023-04-01 23:40:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:40:09,726 INFO L225 Difference]: With dead ends: 328657 [2023-04-01 23:40:09,726 INFO L226 Difference]: Without dead ends: 184929 [2023-04-01 23:40:09,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3251 GetRequests, 3093 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9550 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4654, Invalid=20468, Unknown=0, NotChecked=0, Total=25122 [2023-04-01 23:40:09,897 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 27174 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 37627 mSolverCounterSat, 2881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27174 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 40508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2881 IncrementalHoareTripleChecker+Valid, 37627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:40:09,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27174 Valid, 752 Invalid, 40508 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2881 Valid, 37627 Invalid, 0 Unknown, 0 Unchecked, 22.7s Time] [2023-04-01 23:40:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184929 states. [2023-04-01 23:40:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184929 to 170799. [2023-04-01 23:40:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170799 states, 168119 states have (on average 1.02601728537524) internal successors, (172493), 168832 states have internal predecessors, (172493), 719 states have call successors, (719), 719 states have call predecessors, (719), 1960 states have return successors, (8174), 1247 states have call predecessors, (8174), 718 states have call successors, (8174) [2023-04-01 23:40:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170799 states to 170799 states and 181386 transitions. [2023-04-01 23:40:13,461 INFO L78 Accepts]: Start accepts. Automaton has 170799 states and 181386 transitions. Word has length 1497 [2023-04-01 23:40:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:40:13,463 INFO L495 AbstractCegarLoop]: Abstraction has 170799 states and 181386 transitions. [2023-04-01 23:40:13,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.08333333333333) internal successors, (1922), 22 states have internal predecessors, (1922), 13 states have call successors, (22), 10 states have call predecessors, (22), 11 states have return successors, (20), 13 states have call predecessors, (20), 11 states have call successors, (20) [2023-04-01 23:40:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 170799 states and 181386 transitions. [2023-04-01 23:40:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1728 [2023-04-01 23:40:13,525 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:40:13,525 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:40:13,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:40:13,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 23:40:13,726 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:40:13,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:40:13,727 INFO L85 PathProgramCache]: Analyzing trace with hash 53070349, now seen corresponding path program 1 times [2023-04-01 23:40:13,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:40:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696036125] [2023-04-01 23:40:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:40:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:40:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:14,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:40:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:14,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:40:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:40:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:14,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:40:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:14,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:40:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:40:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:40:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 985 [2023-04-01 23:40:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1096 [2023-04-01 23:40:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1167 [2023-04-01 23:40:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1240 [2023-04-01 23:40:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:40:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 374 proven. 7 refuted. 0 times theorem prover too weak. 2691 trivial. 0 not checked. [2023-04-01 23:40:15,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:40:15,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696036125] [2023-04-01 23:40:15,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696036125] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:40:15,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540210804] [2023-04-01 23:40:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:40:15,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:40:15,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:40:15,408 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:40:15,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 23:40:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:15,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 2217 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:40:15,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:40:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 2691 trivial. 0 not checked. [2023-04-01 23:40:15,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:40:15,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540210804] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:40:15,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:40:15,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:40:15,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129808929] [2023-04-01 23:40:15,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:40:15,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:40:15,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:40:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:40:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:40:15,912 INFO L87 Difference]: Start difference. First operand 170799 states and 181386 transitions. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 23:40:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:40:18,647 INFO L93 Difference]: Finished difference Result 335106 states and 355778 transitions. [2023-04-01 23:40:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:40:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 1727 [2023-04-01 23:40:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:40:19,186 INFO L225 Difference]: With dead ends: 335106 [2023-04-01 23:40:19,186 INFO L226 Difference]: Without dead ends: 165023 [2023-04-01 23:40:19,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1756 GetRequests, 1752 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:40:19,282 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 681 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:40:19,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 169 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 23:40:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165023 states. [2023-04-01 23:40:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165023 to 156581. [2023-04-01 23:40:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156581 states, 154095 states have (on average 1.0186313637691036) internal successors, (156966), 154764 states have internal predecessors, (156966), 659 states have call successors, (659), 659 states have call predecessors, (659), 1826 states have return successors, (5431), 1157 states have call predecessors, (5431), 658 states have call successors, (5431) [2023-04-01 23:40:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156581 states to 156581 states and 163056 transitions. [2023-04-01 23:40:21,695 INFO L78 Accepts]: Start accepts. Automaton has 156581 states and 163056 transitions. Word has length 1727 [2023-04-01 23:40:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:40:21,696 INFO L495 AbstractCegarLoop]: Abstraction has 156581 states and 163056 transitions. [2023-04-01 23:40:21,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 23:40:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 156581 states and 163056 transitions. [2023-04-01 23:40:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2023-04-01 23:40:21,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:40:21,798 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:40:21,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 23:40:21,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:40:21,999 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:40:21,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:40:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1643063722, now seen corresponding path program 1 times [2023-04-01 23:40:21,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:40:21,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892528490] [2023-04-01 23:40:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:40:22,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:40:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:24,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:40:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:24,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:40:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:40:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2023-04-01 23:40:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 535 [2023-04-01 23:40:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:40:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 842 [2023-04-01 23:40:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 985 [2023-04-01 23:40:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1096 [2023-04-01 23:40:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1218 [2023-04-01 23:40:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:40:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1605 [2023-04-01 23:40:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 1780 proven. 236 refuted. 0 times theorem prover too weak. 1973 trivial. 0 not checked. [2023-04-01 23:40:25,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:40:25,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892528490] [2023-04-01 23:40:25,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892528490] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:40:25,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443145194] [2023-04-01 23:40:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:40:25,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:40:25,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:40:25,617 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:40:25,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 23:40:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:40:26,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 2401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:40:26,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:40:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 2705 proven. 2 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2023-04-01 23:40:26,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:40:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 873 proven. 242 refuted. 0 times theorem prover too weak. 2874 trivial. 0 not checked. [2023-04-01 23:40:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443145194] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:40:28,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:40:28,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-04-01 23:40:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096427906] [2023-04-01 23:40:28,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:40:28,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 23:40:28,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:40:28,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 23:40:28,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:40:28,602 INFO L87 Difference]: Start difference. First operand 156581 states and 163056 transitions. Second operand has 16 states, 16 states have (on average 92.375) internal successors, (1478), 14 states have internal predecessors, (1478), 7 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15)