/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:22:05,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:22:05,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:22:05,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:22:05,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:22:05,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:22:05,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:22:05,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:22:05,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:22:05,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:22:05,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:22:05,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:22:05,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:22:05,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:22:05,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:22:05,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:22:05,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:22:05,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:22:05,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:22:05,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:22:05,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:22:05,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:22:05,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:22:05,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:22:05,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:22:05,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:22:05,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:22:05,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:22:05,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:22:05,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:22:05,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:22:05,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:22:05,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:22:05,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:22:05,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:22:05,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:22:05,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:22:05,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:22:05,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:22:05,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:22:05,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:22:05,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:22:05,452 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:22:05,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:22:05,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:22:05,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:22:05,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:22:05,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:22:05,454 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:22:05,454 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:22:05,454 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:22:05,454 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:22:05,454 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:22:05,454 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:22:05,454 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:22:05,455 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:22:05,455 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:22:05,455 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:22:05,455 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:22:05,455 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:22:05,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:22:05,456 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:22:05,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:22:05,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:22:05,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:22:05,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:22:05,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:22:05,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:22:05,457 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:22:05,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:22:05,457 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:22:05,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:22:05,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:22:05,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:22:05,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:22:05,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:22:05,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:22:05,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:22:05,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:22:05,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:22:05,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:22:05,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:22:05,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:22:05,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:22:05,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:22:05,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:22:05,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:22:05,649 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:22:05,650 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:22:05,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2023-04-03 01:22:06,804 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:22:07,047 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:22:07,047 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2023-04-03 01:22:07,062 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9641c8f/9ee1c9df43874dddb5617d68fa0d0b63/FLAG42c9bc2d0 [2023-04-03 01:22:07,075 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e9641c8f/9ee1c9df43874dddb5617d68fa0d0b63 [2023-04-03 01:22:07,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:22:07,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:22:07,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:22:07,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:22:07,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:22:07,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d49d8fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07, skipping insertion in model container [2023-04-03 01:22:07,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:22:07,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:22:07,261 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/systemc/mem_slave_tlm.3.cil.c[646,659] [2023-04-03 01:22:07,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:22:07,366 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:22:07,374 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/systemc/mem_slave_tlm.3.cil.c[646,659] [2023-04-03 01:22:07,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:22:07,443 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:22:07,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07 WrapperNode [2023-04-03 01:22:07,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:22:07,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:22:07,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:22:07,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:22:07,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,521 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:22:07,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:22:07,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:22:07,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:22:07,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (1/1) ... [2023-04-03 01:22:07,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:22:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:22:07,578 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) [2023-04-03 01:22:07,579 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 [2023-04-03 01:22:07,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:22:07,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:22:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:22:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-03 01:22:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2023-04-03 01:22:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2023-04-03 01:22:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2023-04-03 01:22:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2023-04-03 01:22:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-03 01:22:07,608 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-03 01:22:07,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2023-04-03 01:22:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:22:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:22:07,702 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:22:07,704 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:22:08,528 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:22:08,683 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:22:08,683 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-04-03 01:22:08,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:22:08 BoogieIcfgContainer [2023-04-03 01:22:08,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:22:08,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:22:08,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:22:08,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:22:08,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:22:07" (1/3) ... [2023-04-03 01:22:08,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1131b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:22:08, skipping insertion in model container [2023-04-03 01:22:08,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:22:07" (2/3) ... [2023-04-03 01:22:08,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1131b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:22:08, skipping insertion in model container [2023-04-03 01:22:08,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:22:08" (3/3) ... [2023-04-03 01:22:08,693 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.3.cil.c [2023-04-03 01:22:08,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:22:08,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:22:08,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:22:08,765 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c1d580e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:22:08,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:22:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 257 states, 233 states have (on average 1.742489270386266) internal successors, (406), 241 states have internal predecessors, (406), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-03 01:22:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-03 01:22:08,786 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:08,787 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] [2023-04-03 01:22:08,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:08,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:08,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1172039294, now seen corresponding path program 1 times [2023-04-03 01:22:08,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:08,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142108549] [2023-04-03 01:22:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:08,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:09,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:09,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142108549] [2023-04-03 01:22:09,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142108549] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:09,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:09,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:22:09,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593439837] [2023-04-03 01:22:09,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:09,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:22:09,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:22:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:09,320 INFO L87 Difference]: Start difference. First operand has 257 states, 233 states have (on average 1.742489270386266) internal successors, (406), 241 states have internal predecessors, (406), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:09,654 INFO L93 Difference]: Finished difference Result 684 states and 1156 transitions. [2023-04-03 01:22:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:22:09,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2023-04-03 01:22:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:09,668 INFO L225 Difference]: With dead ends: 684 [2023-04-03 01:22:09,668 INFO L226 Difference]: Without dead ends: 423 [2023-04-03 01:22:09,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:09,676 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 241 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:09,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 600 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:22:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-04-03 01:22:09,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 416. [2023-04-03 01:22:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 386 states have (on average 1.5103626943005182) internal successors, (583), 394 states have internal predecessors, (583), 18 states have call successors, (18), 14 states have call predecessors, (18), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-04-03 01:22:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 616 transitions. [2023-04-03 01:22:09,742 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 616 transitions. Word has length 34 [2023-04-03 01:22:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:09,743 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 616 transitions. [2023-04-03 01:22:09,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 616 transitions. [2023-04-03 01:22:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 01:22:09,746 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:09,747 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] [2023-04-03 01:22:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:22:09,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:09,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1167664298, now seen corresponding path program 1 times [2023-04-03 01:22:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771432926] [2023-04-03 01:22:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:09,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:09,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771432926] [2023-04-03 01:22:09,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771432926] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:09,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:09,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:22:09,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46703772] [2023-04-03 01:22:09,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:09,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:22:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:22:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:22:09,939 INFO L87 Difference]: Start difference. First operand 416 states and 616 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:10,443 INFO L93 Difference]: Finished difference Result 1366 states and 2031 transitions. [2023-04-03 01:22:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 01:22:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-03 01:22:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:10,449 INFO L225 Difference]: With dead ends: 1366 [2023-04-03 01:22:10,449 INFO L226 Difference]: Without dead ends: 964 [2023-04-03 01:22:10,452 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 [2023-04-03 01:22:10,453 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 671 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:10,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 863 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:22:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2023-04-03 01:22:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 902. [2023-04-03 01:22:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 848 states have (on average 1.4363207547169812) internal successors, (1218), 861 states have internal predecessors, (1218), 30 states have call successors, (30), 26 states have call predecessors, (30), 23 states have return successors, (52), 23 states have call predecessors, (52), 23 states have call successors, (52) [2023-04-03 01:22:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1300 transitions. [2023-04-03 01:22:10,528 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1300 transitions. Word has length 47 [2023-04-03 01:22:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:10,528 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1300 transitions. [2023-04-03 01:22:10,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1300 transitions. [2023-04-03 01:22:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 01:22:10,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:10,539 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] [2023-04-03 01:22:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:22:10,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:10,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash 788987198, now seen corresponding path program 1 times [2023-04-03 01:22:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:10,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724124972] [2023-04-03 01:22:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:10,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:10,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724124972] [2023-04-03 01:22:10,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724124972] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:10,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:10,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:22:10,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399054887] [2023-04-03 01:22:10,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:10,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:22:10,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:10,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:22:10,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:10,620 INFO L87 Difference]: Start difference. First operand 902 states and 1300 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:10,827 INFO L93 Difference]: Finished difference Result 2303 states and 3446 transitions. [2023-04-03 01:22:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:22:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-03 01:22:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:10,836 INFO L225 Difference]: With dead ends: 2303 [2023-04-03 01:22:10,836 INFO L226 Difference]: Without dead ends: 1416 [2023-04-03 01:22:10,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:10,841 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 275 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:10,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 857 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:22:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2023-04-03 01:22:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1409. [2023-04-03 01:22:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1324 states have (on average 1.4788519637462236) internal successors, (1958), 1343 states have internal predecessors, (1958), 47 states have call successors, (47), 43 states have call predecessors, (47), 37 states have return successors, (96), 37 states have call predecessors, (96), 40 states have call successors, (96) [2023-04-03 01:22:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 2101 transitions. [2023-04-03 01:22:10,934 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 2101 transitions. Word has length 47 [2023-04-03 01:22:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:10,935 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 2101 transitions. [2023-04-03 01:22:10,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 2101 transitions. [2023-04-03 01:22:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:22:10,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:10,939 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] [2023-04-03 01:22:10,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:22:10,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:10,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2051277570, now seen corresponding path program 1 times [2023-04-03 01:22:10,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:10,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867265603] [2023-04-03 01:22:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:10,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:11,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:11,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867265603] [2023-04-03 01:22:11,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867265603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:11,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:11,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 01:22:11,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194060312] [2023-04-03 01:22:11,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:11,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 01:22:11,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 01:22:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 01:22:11,107 INFO L87 Difference]: Start difference. First operand 1409 states and 2101 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:11,357 INFO L93 Difference]: Finished difference Result 2815 states and 4209 transitions. [2023-04-03 01:22:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 01:22:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-03 01:22:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:11,364 INFO L225 Difference]: With dead ends: 2815 [2023-04-03 01:22:11,364 INFO L226 Difference]: Without dead ends: 1421 [2023-04-03 01:22:11,369 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 [2023-04-03 01:22:11,370 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 797 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:11,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 774 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:22:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2023-04-03 01:22:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1409. [2023-04-03 01:22:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1324 states have (on average 1.4788519637462236) internal successors, (1958), 1343 states have internal predecessors, (1958), 47 states have call successors, (47), 43 states have call predecessors, (47), 37 states have return successors, (96), 37 states have call predecessors, (96), 40 states have call successors, (96) [2023-04-03 01:22:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 2101 transitions. [2023-04-03 01:22:11,460 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 2101 transitions. Word has length 48 [2023-04-03 01:22:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:11,460 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 2101 transitions. [2023-04-03 01:22:11,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 2101 transitions. [2023-04-03 01:22:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:22:11,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:11,462 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] [2023-04-03 01:22:11,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:22:11,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:11,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:11,463 INFO L85 PathProgramCache]: Analyzing trace with hash 739192307, now seen corresponding path program 1 times [2023-04-03 01:22:11,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:11,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053764887] [2023-04-03 01:22:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:11,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:11,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053764887] [2023-04-03 01:22:11,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053764887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:11,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:11,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:22:11,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133594473] [2023-04-03 01:22:11,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:11,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:22:11,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:11,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:22:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:11,586 INFO L87 Difference]: Start difference. First operand 1409 states and 2101 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:11,787 INFO L93 Difference]: Finished difference Result 3377 states and 5352 transitions. [2023-04-03 01:22:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:22:11,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-03 01:22:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:11,802 INFO L225 Difference]: With dead ends: 3377 [2023-04-03 01:22:11,802 INFO L226 Difference]: Without dead ends: 2103 [2023-04-03 01:22:11,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:11,814 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 302 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:11,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 631 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:22:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2023-04-03 01:22:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 2064. [2023-04-03 01:22:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1940 states have (on average 1.4860824742268042) internal successors, (2883), 1970 states have internal predecessors, (2883), 70 states have call successors, (70), 66 states have call predecessors, (70), 53 states have return successors, (277), 53 states have call predecessors, (277), 63 states have call successors, (277) [2023-04-03 01:22:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3230 transitions. [2023-04-03 01:22:11,983 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3230 transitions. Word has length 48 [2023-04-03 01:22:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:11,983 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 3230 transitions. [2023-04-03 01:22:11,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3230 transitions. [2023-04-03 01:22:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 01:22:11,985 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:11,986 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:22:11,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:22:11,986 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:11,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash -91217746, now seen corresponding path program 1 times [2023-04-03 01:22:11,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:11,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907408135] [2023-04-03 01:22:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:12,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:12,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907408135] [2023-04-03 01:22:12,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907408135] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:12,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:12,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:22:12,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80066360] [2023-04-03 01:22:12,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:12,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:22:12,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:22:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:22:12,207 INFO L87 Difference]: Start difference. First operand 2064 states and 3230 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:22:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:14,156 INFO L93 Difference]: Finished difference Result 10163 states and 19858 transitions. [2023-04-03 01:22:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 01:22:14,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-04-03 01:22:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:14,215 INFO L225 Difference]: With dead ends: 10163 [2023-04-03 01:22:14,215 INFO L226 Difference]: Without dead ends: 8286 [2023-04-03 01:22:14,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:22:14,256 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 1900 mSDsluCounter, 1658 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1909 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:14,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1909 Valid, 2284 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 01:22:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2023-04-03 01:22:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 7432. [2023-04-03 01:22:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 6767 states have (on average 1.4863307226245013) internal successors, (10058), 7070 states have internal predecessors, (10058), 395 states have call successors, (395), 258 states have call predecessors, (395), 269 states have return successors, (3743), 320 states have call predecessors, (3743), 388 states have call successors, (3743) [2023-04-03 01:22:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 14196 transitions. [2023-04-03 01:22:15,078 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 14196 transitions. Word has length 54 [2023-04-03 01:22:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:15,078 INFO L495 AbstractCegarLoop]: Abstraction has 7432 states and 14196 transitions. [2023-04-03 01:22:15,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:22:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 14196 transitions. [2023-04-03 01:22:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 01:22:15,080 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:15,081 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] [2023-04-03 01:22:15,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:22:15,081 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:15,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:15,081 INFO L85 PathProgramCache]: Analyzing trace with hash 225191966, now seen corresponding path program 1 times [2023-04-03 01:22:15,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:15,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609329710] [2023-04-03 01:22:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:15,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:15,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609329710] [2023-04-03 01:22:15,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609329710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:15,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:15,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:22:15,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011166262] [2023-04-03 01:22:15,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:15,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:22:15,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:15,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:22:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:15,264 INFO L87 Difference]: Start difference. First operand 7432 states and 14196 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:16,206 INFO L93 Difference]: Finished difference Result 17486 states and 39372 transitions. [2023-04-03 01:22:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:22:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-03 01:22:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:16,311 INFO L225 Difference]: With dead ends: 17486 [2023-04-03 01:22:16,311 INFO L226 Difference]: Without dead ends: 10121 [2023-04-03 01:22:16,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:16,466 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 314 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:16,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 564 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:22:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10121 states. [2023-04-03 01:22:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10121 to 9617. [2023-04-03 01:22:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9617 states, 8680 states have (on average 1.4826036866359447) internal successors, (12869), 9085 states have internal predecessors, (12869), 581 states have call successors, (581), 379 states have call predecessors, (581), 355 states have return successors, (6781), 407 states have call predecessors, (6781), 574 states have call successors, (6781) [2023-04-03 01:22:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9617 states to 9617 states and 20231 transitions. [2023-04-03 01:22:17,833 INFO L78 Accepts]: Start accepts. Automaton has 9617 states and 20231 transitions. Word has length 58 [2023-04-03 01:22:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:17,835 INFO L495 AbstractCegarLoop]: Abstraction has 9617 states and 20231 transitions. [2023-04-03 01:22:17,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 01:22:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 9617 states and 20231 transitions. [2023-04-03 01:22:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 01:22:17,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:17,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:22:17,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:22:17,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:17,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash -961875357, now seen corresponding path program 1 times [2023-04-03 01:22:17,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:17,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197272170] [2023-04-03 01:22:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:17,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:17,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197272170] [2023-04-03 01:22:17,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197272170] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:17,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:17,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:22:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497450873] [2023-04-03 01:22:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:17,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:22:17,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:22:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:18,000 INFO L87 Difference]: Start difference. First operand 9617 states and 20231 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 01:22:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:19,463 INFO L93 Difference]: Finished difference Result 22962 states and 59385 transitions. [2023-04-03 01:22:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:22:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 69 [2023-04-03 01:22:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:19,597 INFO L225 Difference]: With dead ends: 22962 [2023-04-03 01:22:19,597 INFO L226 Difference]: Without dead ends: 13402 [2023-04-03 01:22:19,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:19,869 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 226 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:19,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 676 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:22:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13402 states. [2023-04-03 01:22:21,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13402 to 13153. [2023-04-03 01:22:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13153 states, 11844 states have (on average 1.4286558595069234) internal successors, (16921), 12405 states have internal predecessors, (16921), 807 states have call successors, (807), 529 states have call predecessors, (807), 501 states have return successors, (11974), 561 states have call predecessors, (11974), 800 states have call successors, (11974) [2023-04-03 01:22:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13153 states to 13153 states and 29702 transitions. [2023-04-03 01:22:21,884 INFO L78 Accepts]: Start accepts. Automaton has 13153 states and 29702 transitions. Word has length 69 [2023-04-03 01:22:21,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:21,884 INFO L495 AbstractCegarLoop]: Abstraction has 13153 states and 29702 transitions. [2023-04-03 01:22:21,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 01:22:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 13153 states and 29702 transitions. [2023-04-03 01:22:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 01:22:21,888 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:21,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:22:21,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 01:22:21,888 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:21,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:21,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1265900791, now seen corresponding path program 1 times [2023-04-03 01:22:21,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:21,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107791483] [2023-04-03 01:22:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:21,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:22,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107791483] [2023-04-03 01:22:22,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107791483] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:22,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:22,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:22:22,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458977665] [2023-04-03 01:22:22,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:22,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:22:22,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:22:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:22,022 INFO L87 Difference]: Start difference. First operand 13153 states and 29702 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:22:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:23,570 INFO L93 Difference]: Finished difference Result 25956 states and 68190 transitions. [2023-04-03 01:22:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:22:23,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2023-04-03 01:22:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:23,680 INFO L225 Difference]: With dead ends: 25956 [2023-04-03 01:22:23,681 INFO L226 Difference]: Without dead ends: 12860 [2023-04-03 01:22:23,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:23,930 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 318 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:23,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 356 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:22:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12860 states. [2023-04-03 01:22:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12860 to 12860. [2023-04-03 01:22:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12860 states, 11551 states have (on average 1.4222145268807895) internal successors, (16428), 12112 states have internal predecessors, (16428), 807 states have call successors, (807), 529 states have call predecessors, (807), 501 states have return successors, (11953), 561 states have call predecessors, (11953), 800 states have call successors, (11953) [2023-04-03 01:22:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12860 states to 12860 states and 29188 transitions. [2023-04-03 01:22:25,996 INFO L78 Accepts]: Start accepts. Automaton has 12860 states and 29188 transitions. Word has length 71 [2023-04-03 01:22:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:25,997 INFO L495 AbstractCegarLoop]: Abstraction has 12860 states and 29188 transitions. [2023-04-03 01:22:25,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:22:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 12860 states and 29188 transitions. [2023-04-03 01:22:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 01:22:26,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:26,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:22:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 01:22:26,005 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:26,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1184966521, now seen corresponding path program 1 times [2023-04-03 01:22:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393027171] [2023-04-03 01:22:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:26,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:26,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393027171] [2023-04-03 01:22:26,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393027171] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:26,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:26,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:22:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285956571] [2023-04-03 01:22:26,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:26,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:22:26,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:22:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:26,090 INFO L87 Difference]: Start difference. First operand 12860 states and 29188 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 01:22:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:27,323 INFO L93 Difference]: Finished difference Result 23378 states and 56514 transitions. [2023-04-03 01:22:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:22:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 72 [2023-04-03 01:22:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:27,405 INFO L225 Difference]: With dead ends: 23378 [2023-04-03 01:22:27,406 INFO L226 Difference]: Without dead ends: 10533 [2023-04-03 01:22:27,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:22:27,655 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 131 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:27,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 724 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:22:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10533 states. [2023-04-03 01:22:28,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10533 to 9918. [2023-04-03 01:22:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9918 states, 9010 states have (on average 1.4298557158712542) internal successors, (12883), 9387 states have internal predecessors, (12883), 555 states have call successors, (555), 379 states have call predecessors, (555), 352 states have return successors, (6184), 364 states have call predecessors, (6184), 548 states have call successors, (6184) [2023-04-03 01:22:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9918 states to 9918 states and 19622 transitions. [2023-04-03 01:22:28,657 INFO L78 Accepts]: Start accepts. Automaton has 9918 states and 19622 transitions. Word has length 72 [2023-04-03 01:22:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:28,657 INFO L495 AbstractCegarLoop]: Abstraction has 9918 states and 19622 transitions. [2023-04-03 01:22:28,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 01:22:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 9918 states and 19622 transitions. [2023-04-03 01:22:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 01:22:28,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:28,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:22:28,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 01:22:28,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:28,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1630185205, now seen corresponding path program 1 times [2023-04-03 01:22:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:28,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295121557] [2023-04-03 01:22:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:28,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:28,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295121557] [2023-04-03 01:22:28,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295121557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:28,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:28,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 01:22:28,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009585869] [2023-04-03 01:22:28,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:28,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 01:22:28,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 01:22:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:22:28,875 INFO L87 Difference]: Start difference. First operand 9918 states and 19622 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 01:22:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:30,800 INFO L93 Difference]: Finished difference Result 28479 states and 71374 transitions. [2023-04-03 01:22:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 01:22:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2023-04-03 01:22:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:31,078 INFO L225 Difference]: With dead ends: 28479 [2023-04-03 01:22:31,078 INFO L226 Difference]: Without dead ends: 18661 [2023-04-03 01:22:31,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-03 01:22:31,222 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 796 mSDsluCounter, 1834 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:31,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 2264 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:22:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18661 states. [2023-04-03 01:22:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18661 to 18128. [2023-04-03 01:22:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18128 states, 16396 states have (on average 1.427848255672115) internal successors, (23411), 17189 states have internal predecessors, (23411), 1027 states have call successors, (1027), 691 states have call predecessors, (1027), 704 states have return successors, (19828), 658 states have call predecessors, (19828), 1020 states have call successors, (19828) [2023-04-03 01:22:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 44266 transitions. [2023-04-03 01:22:33,992 INFO L78 Accepts]: Start accepts. Automaton has 18128 states and 44266 transitions. Word has length 74 [2023-04-03 01:22:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:33,993 INFO L495 AbstractCegarLoop]: Abstraction has 18128 states and 44266 transitions. [2023-04-03 01:22:33,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 01:22:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18128 states and 44266 transitions. [2023-04-03 01:22:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 01:22:33,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:33,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:22:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 01:22:33,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:33,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash 784854970, now seen corresponding path program 1 times [2023-04-03 01:22:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163828923] [2023-04-03 01:22:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:33,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:34,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163828923] [2023-04-03 01:22:34,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163828923] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:34,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:34,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 01:22:34,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957954141] [2023-04-03 01:22:34,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:34,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:22:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:22:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:22:34,131 INFO L87 Difference]: Start difference. First operand 18128 states and 44266 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 01:22:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:36,136 INFO L93 Difference]: Finished difference Result 37885 states and 106998 transitions. [2023-04-03 01:22:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-03 01:22:36,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2023-04-03 01:22:36,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:36,310 INFO L225 Difference]: With dead ends: 37885 [2023-04-03 01:22:36,310 INFO L226 Difference]: Without dead ends: 19857 [2023-04-03 01:22:36,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-04-03 01:22:36,897 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 728 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:36,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 2793 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:22:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19857 states. [2023-04-03 01:22:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19857 to 19307. [2023-04-03 01:22:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19307 states, 17421 states have (on average 1.4144997416910625) internal successors, (24642), 18290 states have internal predecessors, (24642), 1123 states have call successors, (1123), 751 states have call predecessors, (1123), 762 states have return successors, (22154), 716 states have call predecessors, (22154), 1116 states have call successors, (22154) [2023-04-03 01:22:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19307 states to 19307 states and 47919 transitions. [2023-04-03 01:22:39,717 INFO L78 Accepts]: Start accepts. Automaton has 19307 states and 47919 transitions. Word has length 75 [2023-04-03 01:22:39,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:39,717 INFO L495 AbstractCegarLoop]: Abstraction has 19307 states and 47919 transitions. [2023-04-03 01:22:39,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 01:22:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 19307 states and 47919 transitions. [2023-04-03 01:22:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 01:22:39,720 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:39,720 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:22:39,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 01:22:39,720 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:39,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1649750746, now seen corresponding path program 1 times [2023-04-03 01:22:39,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:39,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715593975] [2023-04-03 01:22:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:39,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:39,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:39,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715593975] [2023-04-03 01:22:39,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715593975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:39,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:22:39,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 01:22:39,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895866749] [2023-04-03 01:22:39,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:39,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 01:22:39,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:39,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 01:22:39,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:22:39,850 INFO L87 Difference]: Start difference. First operand 19307 states and 47919 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:22:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:44,046 INFO L93 Difference]: Finished difference Result 50189 states and 149787 transitions. [2023-04-03 01:22:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:22:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2023-04-03 01:22:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:44,345 INFO L225 Difference]: With dead ends: 50189 [2023-04-03 01:22:44,345 INFO L226 Difference]: Without dead ends: 30912 [2023-04-03 01:22:44,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-03 01:22:44,782 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 998 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:44,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 534 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:22:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30912 states. [2023-04-03 01:22:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30912 to 29029. [2023-04-03 01:22:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29029 states, 25690 states have (on average 1.426975476839237) internal successors, (36659), 27780 states have internal predecessors, (36659), 2072 states have call successors, (2072), 926 states have call predecessors, (2072), 1266 states have return successors, (47691), 1228 states have call predecessors, (47691), 2065 states have call successors, (47691) [2023-04-03 01:22:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29029 states to 29029 states and 86422 transitions. [2023-04-03 01:22:49,109 INFO L78 Accepts]: Start accepts. Automaton has 29029 states and 86422 transitions. Word has length 85 [2023-04-03 01:22:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:22:49,110 INFO L495 AbstractCegarLoop]: Abstraction has 29029 states and 86422 transitions. [2023-04-03 01:22:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:22:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 29029 states and 86422 transitions. [2023-04-03 01:22:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-03 01:22:49,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:22:49,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-03 01:22:49,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 01:22:49,115 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:22:49,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:22:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2114742345, now seen corresponding path program 1 times [2023-04-03 01:22:49,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:22:49,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067381976] [2023-04-03 01:22:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:22:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 01:22:49,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:22:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067381976] [2023-04-03 01:22:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067381976] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:22:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892177838] [2023-04-03 01:22:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:22:49,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:22:49,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:22:49,231 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) [2023-04-03 01:22:49,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:22:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:22:49,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:22:49,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:22:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:22:49,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:22:49,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892177838] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:22:49,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:22:49,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-03 01:22:49,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385509517] [2023-04-03 01:22:49,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:22:49,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:22:49,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:22:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:22:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:22:49,540 INFO L87 Difference]: Start difference. First operand 29029 states and 86422 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-03 01:22:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:22:53,803 INFO L93 Difference]: Finished difference Result 59251 states and 202519 transitions. [2023-04-03 01:22:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:22:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 99 [2023-04-03 01:22:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:22:54,159 INFO L225 Difference]: With dead ends: 59251 [2023-04-03 01:22:54,159 INFO L226 Difference]: Without dead ends: 30339 [2023-04-03 01:22:55,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:22:55,378 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 152 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:22:55,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 763 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:22:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30339 states. [2023-04-03 01:22:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30339 to 28033. [2023-04-03 01:22:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28033 states, 25143 states have (on average 1.3840432724814065) internal successors, (34799), 26487 states have internal predecessors, (34799), 1603 states have call successors, (1603), 975 states have call predecessors, (1603), 1286 states have return successors, (43061), 1183 states have call predecessors, (43061), 1596 states have call successors, (43061) [2023-04-03 01:23:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28033 states to 28033 states and 79463 transitions. [2023-04-03 01:23:00,294 INFO L78 Accepts]: Start accepts. Automaton has 28033 states and 79463 transitions. Word has length 99 [2023-04-03 01:23:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:00,294 INFO L495 AbstractCegarLoop]: Abstraction has 28033 states and 79463 transitions. [2023-04-03 01:23:00,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-03 01:23:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 28033 states and 79463 transitions. [2023-04-03 01:23:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-03 01:23:00,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:00,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-03 01:23:00,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:00,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-03 01:23:00,507 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:00,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:00,507 INFO L85 PathProgramCache]: Analyzing trace with hash 677167697, now seen corresponding path program 1 times [2023-04-03 01:23:00,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:00,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253855027] [2023-04-03 01:23:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:00,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:23:00,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253855027] [2023-04-03 01:23:00,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253855027] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882656002] [2023-04-03 01:23:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:00,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:00,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:00,636 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) [2023-04-03 01:23:00,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 01:23:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:00,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-03 01:23:00,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 01:23:00,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882656002] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:00,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:00,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-03 01:23:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316052507] [2023-04-03 01:23:00,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:00,999 INFO L87 Difference]: Start difference. First operand 28033 states and 79463 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-03 01:23:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:03,054 INFO L93 Difference]: Finished difference Result 39552 states and 121838 transitions. [2023-04-03 01:23:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 108 [2023-04-03 01:23:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:03,346 INFO L225 Difference]: With dead ends: 39552 [2023-04-03 01:23:03,347 INFO L226 Difference]: Without dead ends: 10589 [2023-04-03 01:23:04,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 01:23:04,055 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 330 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:04,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 499 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:23:04,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10589 states. [2023-04-03 01:23:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10589 to 9849. [2023-04-03 01:23:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 8888 states have (on average 1.3704995499549955) internal successors, (12181), 9324 states have internal predecessors, (12181), 511 states have call successors, (511), 336 states have call predecessors, (511), 449 states have return successors, (5725), 421 states have call predecessors, (5725), 504 states have call successors, (5725) [2023-04-03 01:23:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 18417 transitions. [2023-04-03 01:23:05,022 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 18417 transitions. Word has length 108 [2023-04-03 01:23:05,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:05,022 INFO L495 AbstractCegarLoop]: Abstraction has 9849 states and 18417 transitions. [2023-04-03 01:23:05,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-03 01:23:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 18417 transitions. [2023-04-03 01:23:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-03 01:23:05,024 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:05,024 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:23:05,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:05,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-03 01:23:05,230 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:05,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash -92764049, now seen corresponding path program 1 times [2023-04-03 01:23:05,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:05,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382330710] [2023-04-03 01:23:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:05,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:23:05,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:05,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382330710] [2023-04-03 01:23:05,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382330710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:05,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:23:05,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 01:23:05,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059657771] [2023-04-03 01:23:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:05,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 01:23:05,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 01:23:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 01:23:05,347 INFO L87 Difference]: Start difference. First operand 9849 states and 18417 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-03 01:23:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:06,827 INFO L93 Difference]: Finished difference Result 22588 states and 48431 transitions. [2023-04-03 01:23:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 01:23:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 109 [2023-04-03 01:23:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:06,989 INFO L225 Difference]: With dead ends: 22588 [2023-04-03 01:23:06,989 INFO L226 Difference]: Without dead ends: 12912 [2023-04-03 01:23:07,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-03 01:23:07,174 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 768 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:07,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 2548 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 01:23:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12912 states. [2023-04-03 01:23:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12912 to 10139. [2023-04-03 01:23:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10139 states, 9110 states have (on average 1.3667398463227223) internal successors, (12451), 9570 states have internal predecessors, (12451), 545 states have call successors, (545), 362 states have call predecessors, (545), 483 states have return successors, (6350), 459 states have call predecessors, (6350), 538 states have call successors, (6350) [2023-04-03 01:23:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10139 states to 10139 states and 19346 transitions. [2023-04-03 01:23:08,170 INFO L78 Accepts]: Start accepts. Automaton has 10139 states and 19346 transitions. Word has length 109 [2023-04-03 01:23:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:08,171 INFO L495 AbstractCegarLoop]: Abstraction has 10139 states and 19346 transitions. [2023-04-03 01:23:08,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-03 01:23:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 10139 states and 19346 transitions. [2023-04-03 01:23:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-03 01:23:08,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:08,173 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 01:23:08,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 01:23:08,173 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:08,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:08,173 INFO L85 PathProgramCache]: Analyzing trace with hash -257505518, now seen corresponding path program 1 times [2023-04-03 01:23:08,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:08,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559130184] [2023-04-03 01:23:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:08,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:23:08,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:08,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559130184] [2023-04-03 01:23:08,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559130184] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:08,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563182351] [2023-04-03 01:23:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:08,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:08,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:08,393 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) [2023-04-03 01:23:08,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 01:23:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:08,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 01:23:08,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 01:23:08,812 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:08,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563182351] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:08,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:08,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-03 01:23:08,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729723201] [2023-04-03 01:23:08,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:08,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:08,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:23:08,814 INFO L87 Difference]: Start difference. First operand 10139 states and 19346 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-03 01:23:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:09,747 INFO L93 Difference]: Finished difference Result 11534 states and 22778 transitions. [2023-04-03 01:23:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:09,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 115 [2023-04-03 01:23:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:09,816 INFO L225 Difference]: With dead ends: 11534 [2023-04-03 01:23:09,816 INFO L226 Difference]: Without dead ends: 11530 [2023-04-03 01:23:09,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:23:09,830 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 213 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:09,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 679 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11530 states. [2023-04-03 01:23:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11530 to 11442. [2023-04-03 01:23:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11442 states, 10277 states have (on average 1.3704388440206285) internal successors, (14084), 10794 states have internal predecessors, (14084), 620 states have call successors, (620), 411 states have call predecessors, (620), 544 states have return successors, (7968), 524 states have call predecessors, (7968), 613 states have call successors, (7968) [2023-04-03 01:23:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11442 states to 11442 states and 22672 transitions. [2023-04-03 01:23:10,992 INFO L78 Accepts]: Start accepts. Automaton has 11442 states and 22672 transitions. Word has length 115 [2023-04-03 01:23:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:10,992 INFO L495 AbstractCegarLoop]: Abstraction has 11442 states and 22672 transitions. [2023-04-03 01:23:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-03 01:23:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 11442 states and 22672 transitions. [2023-04-03 01:23:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-04-03 01:23:10,996 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:10,996 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-03 01:23:11,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:11,205 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:11,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2023539235, now seen corresponding path program 1 times [2023-04-03 01:23:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23250300] [2023-04-03 01:23:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:11,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:23:11,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:11,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23250300] [2023-04-03 01:23:11,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23250300] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:11,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444999914] [2023-04-03 01:23:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:11,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:11,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:11,565 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) [2023-04-03 01:23:11,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 01:23:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:11,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:11,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 01:23:11,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:11,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444999914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:11,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:11,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-04-03 01:23:11,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940352266] [2023-04-03 01:23:11,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:11,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:23:11,898 INFO L87 Difference]: Start difference. First operand 11442 states and 22672 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-03 01:23:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:12,933 INFO L93 Difference]: Finished difference Result 22634 states and 51515 transitions. [2023-04-03 01:23:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:12,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 172 [2023-04-03 01:23:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:13,059 INFO L225 Difference]: With dead ends: 22634 [2023-04-03 01:23:13,059 INFO L226 Difference]: Without dead ends: 11406 [2023-04-03 01:23:13,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:23:13,198 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 266 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:13,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 344 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:23:13,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11406 states. [2023-04-03 01:23:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11406 to 11406. [2023-04-03 01:23:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 10241 states have (on average 1.351137584220291) internal successors, (13837), 10758 states have internal predecessors, (13837), 620 states have call successors, (620), 411 states have call predecessors, (620), 544 states have return successors, (7960), 524 states have call predecessors, (7960), 613 states have call successors, (7960) [2023-04-03 01:23:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 22417 transitions. [2023-04-03 01:23:14,547 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 22417 transitions. Word has length 172 [2023-04-03 01:23:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:14,547 INFO L495 AbstractCegarLoop]: Abstraction has 11406 states and 22417 transitions. [2023-04-03 01:23:14,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-03 01:23:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 22417 transitions. [2023-04-03 01:23:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-03 01:23:14,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:14,550 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:14,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:14,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-03 01:23:14,758 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:14,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:14,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2106349128, now seen corresponding path program 1 times [2023-04-03 01:23:14,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:14,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599235225] [2023-04-03 01:23:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:23:15,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599235225] [2023-04-03 01:23:15,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599235225] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:15,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351408636] [2023-04-03 01:23:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:15,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:15,020 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) [2023-04-03 01:23:15,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 01:23:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:15,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:15,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-03 01:23:15,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351408636] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:15,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2023-04-03 01:23:15,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107439925] [2023-04-03 01:23:15,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:15,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:15,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:23:15,308 INFO L87 Difference]: Start difference. First operand 11406 states and 22417 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-03 01:23:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:16,358 INFO L93 Difference]: Finished difference Result 22598 states and 50379 transitions. [2023-04-03 01:23:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:16,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 173 [2023-04-03 01:23:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:16,492 INFO L225 Difference]: With dead ends: 22598 [2023-04-03 01:23:16,492 INFO L226 Difference]: Without dead ends: 11406 [2023-04-03 01:23:16,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:23:16,787 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 280 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:16,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 345 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:23:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11406 states. [2023-04-03 01:23:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11406 to 11406. [2023-04-03 01:23:17,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 10241 states have (on average 1.3289717800995997) internal successors, (13610), 10758 states have internal predecessors, (13610), 620 states have call successors, (620), 411 states have call predecessors, (620), 544 states have return successors, (7960), 524 states have call predecessors, (7960), 613 states have call successors, (7960) [2023-04-03 01:23:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 22190 transitions. [2023-04-03 01:23:18,017 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 22190 transitions. Word has length 173 [2023-04-03 01:23:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:18,018 INFO L495 AbstractCegarLoop]: Abstraction has 11406 states and 22190 transitions. [2023-04-03 01:23:18,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-03 01:23:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 22190 transitions. [2023-04-03 01:23:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-03 01:23:18,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:18,021 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-03 01:23:18,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:18,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:18,229 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:18,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:18,229 INFO L85 PathProgramCache]: Analyzing trace with hash -712466209, now seen corresponding path program 1 times [2023-04-03 01:23:18,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:18,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506916723] [2023-04-03 01:23:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:18,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-03 01:23:18,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:18,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506916723] [2023-04-03 01:23:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506916723] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:18,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577748534] [2023-04-03 01:23:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:18,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:18,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:18,522 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) [2023-04-03 01:23:18,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 01:23:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:18,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-03 01:23:18,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-03 01:23:18,924 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 01:23:18,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577748534] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:23:18,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 01:23:18,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-03 01:23:18,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708093495] [2023-04-03 01:23:18,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:23:18,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:23:18,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:23:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:23:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:23:18,926 INFO L87 Difference]: Start difference. First operand 11406 states and 22190 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-03 01:23:20,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:23:20,384 INFO L93 Difference]: Finished difference Result 25270 states and 60752 transitions. [2023-04-03 01:23:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:23:20,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 176 [2023-04-03 01:23:20,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:23:20,555 INFO L225 Difference]: With dead ends: 25270 [2023-04-03 01:23:20,556 INFO L226 Difference]: Without dead ends: 14078 [2023-04-03 01:23:20,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-03 01:23:20,836 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 192 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:23:20,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 604 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:23:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14078 states. [2023-04-03 01:23:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14078 to 13774. [2023-04-03 01:23:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13774 states, 12262 states have (on average 1.3037840482792367) internal successors, (15987), 12920 states have internal predecessors, (15987), 822 states have call successors, (822), 540 states have call predecessors, (822), 689 states have return successors, (12209), 673 states have call predecessors, (12209), 815 states have call successors, (12209) [2023-04-03 01:23:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13774 states to 13774 states and 29018 transitions. [2023-04-03 01:23:22,587 INFO L78 Accepts]: Start accepts. Automaton has 13774 states and 29018 transitions. Word has length 176 [2023-04-03 01:23:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:23:22,588 INFO L495 AbstractCegarLoop]: Abstraction has 13774 states and 29018 transitions. [2023-04-03 01:23:22,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-03 01:23:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 13774 states and 29018 transitions. [2023-04-03 01:23:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-04-03 01:23:22,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:23:22,590 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:23:22,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-03 01:23:22,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:22,791 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:23:22,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:23:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 226335567, now seen corresponding path program 1 times [2023-04-03 01:23:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:23:22,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846930562] [2023-04-03 01:23:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:22,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:23:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 01:23:23,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:23:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846930562] [2023-04-03 01:23:23,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846930562] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:23:23,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227876461] [2023-04-03 01:23:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:23:23,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:23:23,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:23:23,380 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) [2023-04-03 01:23:23,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-03 01:23:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:23:23,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-03 01:23:23,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:23:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 01:23:24,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:23:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 01:23:24,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227876461] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:23:24,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305880791] [2023-04-03 01:23:24,516 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2023-04-03 01:23:24,517 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:23:24,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 01:23:24,525 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 01:23:24,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 01:23:25,656 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 181 for LOIs [2023-04-03 01:23:26,295 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 178 for LOIs [2023-04-03 01:23:37,097 WARN L223 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 3421 DAG size of output: 98 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)