/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/systemc/pc_sfifo_2.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:05:31,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:05:31,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:05:31,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:05:31,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:05:31,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:05:31,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:05:31,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:05:31,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:05:31,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:05:31,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:05:31,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:05:31,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:05:31,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:05:31,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:05:31,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:05:31,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:05:31,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:05:31,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:05:31,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:05:31,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:05:31,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:05:31,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:05:31,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:05:31,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 00:05:31,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 00:05:31,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 00:05:31,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 00:05:31,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 00:05:31,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 00:05:31,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 00:05:31,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 00:05:31,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 00:05:31,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 00:05:31,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 00:05:31,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 00:05:31,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 00:05:31,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 00:05:31,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:05:31,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:05:31,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:05:31,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:05:31,428 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:05:31,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:05:31,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:05:31,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:05:31,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:05:31,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:05:31,430 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:05:31,430 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:05:31,430 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:05:31,430 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:05:31,431 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:05:31,431 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:05:31,431 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:05:31,431 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:05:31,432 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:05:31,432 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:05:31,432 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:05:31,432 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:05:31,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:05:31,433 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:05:31,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:05:31,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:05:31,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:05:31,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:05:31,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:05:31,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:05:31,434 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:05:31,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:05:31,434 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:05:31,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:05:31,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:05:31,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:05:31,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:05:31,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:05:31,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:05:31,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:05:31,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:05:31,435 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:05:31,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:05:31,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:05:31,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:05:31,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:05:31,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:05:31,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:05:31,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:05:31,747 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:05:31,748 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:05:31,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/pc_sfifo_2.cil-1.c [2023-04-01 00:05:32,957 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:05:33,244 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:05:33,245 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pc_sfifo_2.cil-1.c [2023-04-01 00:05:33,254 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1275daf/50d867fbdc5a4c19a8ca24ccccd43824/FLAGab34dd6d8 [2023-04-01 00:05:33,271 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1275daf/50d867fbdc5a4c19a8ca24ccccd43824 [2023-04-01 00:05:33,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:05:33,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:05:33,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:05:33,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:05:33,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:05:33,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3deedc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33, skipping insertion in model container [2023-04-01 00:05:33,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:05:33,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:05:33,450 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/pc_sfifo_2.cil-1.c[643,656] [2023-04-01 00:05:33,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:05:33,502 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:05:33,510 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/pc_sfifo_2.cil-1.c[643,656] [2023-04-01 00:05:33,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:05:33,546 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:05:33,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33 WrapperNode [2023-04-01 00:05:33,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:05:33,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:05:33,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:05:33,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:05:33,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,595 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:05:33,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:05:33,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:05:33,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:05:33,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (1/1) ... [2023-04-01 00:05:33,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:05:33,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:05:33,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:05:33,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:05:33,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:05:33,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:05:33,682 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:05:33,682 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 00:05:33,683 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2023-04-01 00:05:33,683 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-04-01 00:05:33,683 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-04-01 00:05:33,683 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 00:05:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 00:05:33,685 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 00:05:33,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-04-01 00:05:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 00:05:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 00:05:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 00:05:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 00:05:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:05:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:05:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:05:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:05:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:05:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:05:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:05:33,762 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:05:33,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:05:34,109 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:05:34,218 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:05:34,218 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 00:05:34,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:05:34 BoogieIcfgContainer [2023-04-01 00:05:34,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:05:34,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:05:34,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:05:34,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:05:34,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:05:33" (1/3) ... [2023-04-01 00:05:34,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de5a466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:05:34, skipping insertion in model container [2023-04-01 00:05:34,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:05:33" (2/3) ... [2023-04-01 00:05:34,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de5a466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:05:34, skipping insertion in model container [2023-04-01 00:05:34,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:05:34" (3/3) ... [2023-04-01 00:05:34,234 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1.c [2023-04-01 00:05:34,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:05:34,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:05:34,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:05:34,332 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;@67ff1863, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:05:34,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:05:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 68 states have internal predecessors, (85), 25 states have call successors, (25), 18 states have call predecessors, (25), 18 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 00:05:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:05:34,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:34,351 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] [2023-04-01 00:05:34,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:34,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1684028879, now seen corresponding path program 1 times [2023-04-01 00:05:34,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:34,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240988345] [2023-04-01 00:05:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:34,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:35,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:35,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240988345] [2023-04-01 00:05:35,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240988345] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:35,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:05:35,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:05:35,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008065837] [2023-04-01 00:05:35,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:35,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:05:35,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:05:35,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:05:35,115 INFO L87 Difference]: Start difference. First operand has 107 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 68 states have internal predecessors, (85), 25 states have call successors, (25), 18 states have call predecessors, (25), 18 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 00:05:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:36,399 INFO L93 Difference]: Finished difference Result 593 states and 871 transitions. [2023-04-01 00:05:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 00:05:36,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2023-04-01 00:05:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:36,426 INFO L225 Difference]: With dead ends: 593 [2023-04-01 00:05:36,427 INFO L226 Difference]: Without dead ends: 473 [2023-04-01 00:05:36,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-04-01 00:05:36,441 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 1011 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:36,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 842 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 00:05:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-01 00:05:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 421. [2023-04-01 00:05:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 279 states have (on average 1.3476702508960574) internal successors, (376), 310 states have internal predecessors, (376), 77 states have call successors, (77), 55 states have call predecessors, (77), 64 states have return successors, (96), 72 states have call predecessors, (96), 73 states have call successors, (96) [2023-04-01 00:05:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 549 transitions. [2023-04-01 00:05:36,564 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 549 transitions. Word has length 60 [2023-04-01 00:05:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:36,566 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 549 transitions. [2023-04-01 00:05:36,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 00:05:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 549 transitions. [2023-04-01 00:05:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:05:36,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:36,571 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] [2023-04-01 00:05:36,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:05:36,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:36,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash -80787730, now seen corresponding path program 1 times [2023-04-01 00:05:36,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:36,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768991047] [2023-04-01 00:05:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:36,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:36,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768991047] [2023-04-01 00:05:36,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768991047] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:36,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:05:36,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:05:36,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297483863] [2023-04-01 00:05:36,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:36,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:05:36,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:36,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:05:36,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:05:36,834 INFO L87 Difference]: Start difference. First operand 421 states and 549 transitions. Second operand has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 00:05:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:37,731 INFO L93 Difference]: Finished difference Result 1263 states and 1750 transitions. [2023-04-01 00:05:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 00:05:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 60 [2023-04-01 00:05:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:37,743 INFO L225 Difference]: With dead ends: 1263 [2023-04-01 00:05:37,743 INFO L226 Difference]: Without dead ends: 858 [2023-04-01 00:05:37,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-04-01 00:05:37,752 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1118 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:37,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 683 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 00:05:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2023-04-01 00:05:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 726. [2023-04-01 00:05:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 489 states have (on average 1.3047034764826175) internal successors, (638), 534 states have internal predecessors, (638), 124 states have call successors, (124), 96 states have call predecessors, (124), 112 states have return successors, (160), 118 states have call predecessors, (160), 120 states have call successors, (160) [2023-04-01 00:05:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 922 transitions. [2023-04-01 00:05:37,872 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 922 transitions. Word has length 60 [2023-04-01 00:05:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:37,873 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 922 transitions. [2023-04-01 00:05:37,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 00:05:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 922 transitions. [2023-04-01 00:05:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 00:05:37,875 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:37,875 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] [2023-04-01 00:05:37,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:05:37,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:37,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1846265183, now seen corresponding path program 1 times [2023-04-01 00:05:37,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:37,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722257007] [2023-04-01 00:05:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:38,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:38,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722257007] [2023-04-01 00:05:38,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722257007] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:38,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:05:38,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:05:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399184280] [2023-04-01 00:05:38,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:38,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:05:38,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:38,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:05:38,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:05:38,104 INFO L87 Difference]: Start difference. First operand 726 states and 922 transitions. Second operand has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 00:05:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:38,675 INFO L93 Difference]: Finished difference Result 2047 states and 2778 transitions. [2023-04-01 00:05:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:05:38,676 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2023-04-01 00:05:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:38,685 INFO L225 Difference]: With dead ends: 2047 [2023-04-01 00:05:38,685 INFO L226 Difference]: Without dead ends: 1338 [2023-04-01 00:05:38,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-01 00:05:38,695 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 369 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:38,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 275 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:05:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2023-04-01 00:05:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1248. [2023-04-01 00:05:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 853 states have (on average 1.3118405627198124) internal successors, (1119), 939 states have internal predecessors, (1119), 208 states have call successors, (208), 145 states have call predecessors, (208), 186 states have return successors, (313), 203 states have call predecessors, (313), 204 states have call successors, (313) [2023-04-01 00:05:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1640 transitions. [2023-04-01 00:05:38,864 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1640 transitions. Word has length 61 [2023-04-01 00:05:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:38,865 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 1640 transitions. [2023-04-01 00:05:38,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 00:05:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1640 transitions. [2023-04-01 00:05:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 00:05:38,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:38,866 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] [2023-04-01 00:05:38,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:05:38,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:38,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:38,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1239971941, now seen corresponding path program 1 times [2023-04-01 00:05:38,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:38,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723872074] [2023-04-01 00:05:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:38,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:38,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723872074] [2023-04-01 00:05:38,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723872074] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:38,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:05:38,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:05:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301570485] [2023-04-01 00:05:38,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:38,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:05:38,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:05:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:05:38,964 INFO L87 Difference]: Start difference. First operand 1248 states and 1640 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 00:05:39,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:39,120 INFO L93 Difference]: Finished difference Result 2278 states and 3063 transitions. [2023-04-01 00:05:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:05:39,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 62 [2023-04-01 00:05:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:39,129 INFO L225 Difference]: With dead ends: 2278 [2023-04-01 00:05:39,129 INFO L226 Difference]: Without dead ends: 1274 [2023-04-01 00:05:39,134 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 [2023-04-01 00:05:39,135 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 82 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:39,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 186 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:05:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2023-04-01 00:05:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1201. [2023-04-01 00:05:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 810 states have (on average 1.2703703703703704) internal successors, (1029), 874 states have internal predecessors, (1029), 203 states have call successors, (203), 157 states have call predecessors, (203), 187 states have return successors, (314), 198 states have call predecessors, (314), 199 states have call successors, (314) [2023-04-01 00:05:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1546 transitions. [2023-04-01 00:05:39,291 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1546 transitions. Word has length 62 [2023-04-01 00:05:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:39,291 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1546 transitions. [2023-04-01 00:05:39,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 00:05:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1546 transitions. [2023-04-01 00:05:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 00:05:39,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:39,293 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:05:39,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:05:39,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:39,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1747233106, now seen corresponding path program 1 times [2023-04-01 00:05:39,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:39,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789758129] [2023-04-01 00:05:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:39,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:39,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:39,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789758129] [2023-04-01 00:05:39,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789758129] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:39,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:05:39,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:05:39,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219207662] [2023-04-01 00:05:39,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:39,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:05:39,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:39,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:05:39,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:05:39,368 INFO L87 Difference]: Start difference. First operand 1201 states and 1546 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-04-01 00:05:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:39,632 INFO L93 Difference]: Finished difference Result 1404 states and 1810 transitions. [2023-04-01 00:05:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:05:39,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 71 [2023-04-01 00:05:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:39,646 INFO L225 Difference]: With dead ends: 1404 [2023-04-01 00:05:39,646 INFO L226 Difference]: Without dead ends: 1401 [2023-04-01 00:05:39,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:05:39,650 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 188 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:39,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 160 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:05:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2023-04-01 00:05:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1238. [2023-04-01 00:05:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 840 states have (on average 1.2666666666666666) internal successors, (1064), 905 states have internal predecessors, (1064), 206 states have call successors, (206), 159 states have call predecessors, (206), 191 states have return successors, (308), 206 states have call predecessors, (308), 203 states have call successors, (308) [2023-04-01 00:05:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1578 transitions. [2023-04-01 00:05:39,795 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1578 transitions. Word has length 71 [2023-04-01 00:05:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:39,796 INFO L495 AbstractCegarLoop]: Abstraction has 1238 states and 1578 transitions. [2023-04-01 00:05:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-04-01 00:05:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1578 transitions. [2023-04-01 00:05:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 00:05:39,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:39,799 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:05:39,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:05:39,799 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:39,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:39,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1670665561, now seen corresponding path program 1 times [2023-04-01 00:05:39,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:39,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959067722] [2023-04-01 00:05:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:40,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959067722] [2023-04-01 00:05:40,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959067722] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:05:40,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093269533] [2023-04-01 00:05:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:40,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:40,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:05:40,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:05:40,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 00:05:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:40,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 00:05:40,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:05:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:40,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 00:05:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:40,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093269533] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 00:05:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549976472] [2023-04-01 00:05:41,017 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2023-04-01 00:05:41,017 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 00:05:41,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 00:05:41,025 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 00:05:41,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 00:05:41,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 58 for LOIs [2023-04-01 00:05:41,284 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 00:05:41,626 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 60 for LOIs [2023-04-01 00:05:41,646 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 74 for LOIs [2023-04-01 00:05:42,338 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 41 for LOIs [2023-04-01 00:05:42,350 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 52 for LOIs [2023-04-01 00:05:42,394 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 58 for LOIs [2023-04-01 00:05:42,726 INFO L197 IcfgInterpreter]: Interpreting procedure do_read_c with input of size 55 for LOIs [2023-04-01 00:05:42,820 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 48 for LOIs [2023-04-01 00:05:42,827 INFO L197 IcfgInterpreter]: Interpreting procedure do_write_p with input of size 65 for LOIs [2023-04-01 00:05:42,915 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 39 for LOIs [2023-04-01 00:05:42,922 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 37 for LOIs [2023-04-01 00:05:42,932 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 31 for LOIs [2023-04-01 00:05:42,941 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 39 for LOIs [2023-04-01 00:05:43,063 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 35 for LOIs [2023-04-01 00:05:43,087 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 35 for LOIs [2023-04-01 00:05:43,110 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 00:05:46,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18848#(and (= ~q_req_up~0 1) (not (= ~p_num_write~0 1)) (= ~q_free~0 1) (= 1 ~c_dr_i~0) (= ~c_num_read~0 1) (= ~p_dw_pc~0 1) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~p_dw_i~0 1) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~a_t~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= |#NULL.base| 0))' at error location [2023-04-01 00:05:46,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 00:05:46,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 00:05:46,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-04-01 00:05:46,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340264138] [2023-04-01 00:05:46,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 00:05:46,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 00:05:46,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 00:05:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=3151, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 00:05:46,722 INFO L87 Difference]: Start difference. First operand 1238 states and 1578 transitions. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 6 states have call successors, (35), 9 states have call predecessors, (35), 6 states have return successors, (28), 5 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 00:05:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:48,685 INFO L93 Difference]: Finished difference Result 4016 states and 5916 transitions. [2023-04-01 00:05:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 00:05:48,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 6 states have call successors, (35), 9 states have call predecessors, (35), 6 states have return successors, (28), 5 states have call predecessors, (28), 3 states have call successors, (28) Word has length 72 [2023-04-01 00:05:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:48,706 INFO L225 Difference]: With dead ends: 4016 [2023-04-01 00:05:48,706 INFO L226 Difference]: Without dead ends: 3607 [2023-04-01 00:05:48,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=630, Invalid=5376, Unknown=0, NotChecked=0, Total=6006 [2023-04-01 00:05:48,718 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 972 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:48,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 898 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 00:05:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3607 states. [2023-04-01 00:05:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3607 to 3239. [2023-04-01 00:05:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 2232 states have (on average 1.299283154121864) internal successors, (2900), 2448 states have internal predecessors, (2900), 527 states have call successors, (527), 358 states have call predecessors, (527), 479 states have return successors, (1156), 524 states have call predecessors, (1156), 523 states have call successors, (1156) [2023-04-01 00:05:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 4583 transitions. [2023-04-01 00:05:49,155 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 4583 transitions. Word has length 72 [2023-04-01 00:05:49,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:49,155 INFO L495 AbstractCegarLoop]: Abstraction has 3239 states and 4583 transitions. [2023-04-01 00:05:49,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 6 states have call successors, (35), 9 states have call predecessors, (35), 6 states have return successors, (28), 5 states have call predecessors, (28), 3 states have call successors, (28) [2023-04-01 00:05:49,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 4583 transitions. [2023-04-01 00:05:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 00:05:49,157 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:49,157 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:05:49,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 00:05:49,365 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,SelfDestructingSolverStorable5 [2023-04-01 00:05:49,365 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:49,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:49,366 INFO L85 PathProgramCache]: Analyzing trace with hash 917574233, now seen corresponding path program 2 times [2023-04-01 00:05:49,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:49,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940514576] [2023-04-01 00:05:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:49,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:05:49,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:49,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940514576] [2023-04-01 00:05:49,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940514576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:49,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:05:49,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:05:49,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7909592] [2023-04-01 00:05:49,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:49,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:05:49,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:05:49,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:05:49,422 INFO L87 Difference]: Start difference. First operand 3239 states and 4583 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-04-01 00:05:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:49,768 INFO L93 Difference]: Finished difference Result 4689 states and 6767 transitions. [2023-04-01 00:05:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:05:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 75 [2023-04-01 00:05:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:49,780 INFO L225 Difference]: With dead ends: 4689 [2023-04-01 00:05:49,780 INFO L226 Difference]: Without dead ends: 2195 [2023-04-01 00:05:49,794 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 [2023-04-01 00:05:49,795 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 83 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:49,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 244 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:05:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2023-04-01 00:05:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1973. [2023-04-01 00:05:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1370 states have (on average 1.2693430656934306) internal successors, (1739), 1488 states have internal predecessors, (1739), 323 states have call successors, (323), 228 states have call predecessors, (323), 279 states have return successors, (585), 307 states have call predecessors, (585), 319 states have call successors, (585) [2023-04-01 00:05:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2647 transitions. [2023-04-01 00:05:50,095 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2647 transitions. Word has length 75 [2023-04-01 00:05:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:50,095 INFO L495 AbstractCegarLoop]: Abstraction has 1973 states and 2647 transitions. [2023-04-01 00:05:50,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2023-04-01 00:05:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2647 transitions. [2023-04-01 00:05:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 00:05:50,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:50,099 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:05:50,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:05:50,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:50,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:50,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1825750021, now seen corresponding path program 1 times [2023-04-01 00:05:50,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:50,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528837369] [2023-04-01 00:05:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:50,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 00:05:50,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:50,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528837369] [2023-04-01 00:05:50,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528837369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:50,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:05:50,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:05:50,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129151615] [2023-04-01 00:05:50,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:50,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:05:50,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:50,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:05:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:05:50,161 INFO L87 Difference]: Start difference. First operand 1973 states and 2647 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-04-01 00:05:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:50,458 INFO L93 Difference]: Finished difference Result 3541 states and 4833 transitions. [2023-04-01 00:05:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:05:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 79 [2023-04-01 00:05:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:50,470 INFO L225 Difference]: With dead ends: 3541 [2023-04-01 00:05:50,471 INFO L226 Difference]: Without dead ends: 2283 [2023-04-01 00:05:50,477 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 [2023-04-01 00:05:50,478 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 51 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:50,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 236 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:05:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2023-04-01 00:05:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2029. [2023-04-01 00:05:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 1404 states have (on average 1.2186609686609686) internal successors, (1711), 1527 states have internal predecessors, (1711), 328 states have call successors, (328), 238 states have call predecessors, (328), 296 states have return successors, (576), 316 states have call predecessors, (576), 324 states have call successors, (576) [2023-04-01 00:05:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 2615 transitions. [2023-04-01 00:05:50,739 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 2615 transitions. Word has length 79 [2023-04-01 00:05:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:50,739 INFO L495 AbstractCegarLoop]: Abstraction has 2029 states and 2615 transitions. [2023-04-01 00:05:50,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-04-01 00:05:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 2615 transitions. [2023-04-01 00:05:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 00:05:50,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:50,744 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 00:05:50,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:05:50,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:50,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2133015377, now seen corresponding path program 1 times [2023-04-01 00:05:50,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:50,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658635243] [2023-04-01 00:05:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:50,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 00:05:50,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:50,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658635243] [2023-04-01 00:05:50,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658635243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:50,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:05:50,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:05:50,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665614280] [2023-04-01 00:05:50,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:50,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:05:50,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:50,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:05:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:05:50,979 INFO L87 Difference]: Start difference. First operand 2029 states and 2615 transitions. Second operand has 9 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 5 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 00:05:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:51,772 INFO L93 Difference]: Finished difference Result 4804 states and 6668 transitions. [2023-04-01 00:05:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:05:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 5 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 89 [2023-04-01 00:05:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:51,793 INFO L225 Difference]: With dead ends: 4804 [2023-04-01 00:05:51,793 INFO L226 Difference]: Without dead ends: 2792 [2023-04-01 00:05:51,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-01 00:05:51,809 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 326 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:51,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 286 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:05:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2023-04-01 00:05:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2729. [2023-04-01 00:05:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 1860 states have (on average 1.1865591397849462) internal successors, (2207), 2003 states have internal predecessors, (2207), 452 states have call successors, (452), 346 states have call predecessors, (452), 416 states have return successors, (888), 439 states have call predecessors, (888), 448 states have call successors, (888) [2023-04-01 00:05:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 3547 transitions. [2023-04-01 00:05:52,242 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 3547 transitions. Word has length 89 [2023-04-01 00:05:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:52,244 INFO L495 AbstractCegarLoop]: Abstraction has 2729 states and 3547 transitions. [2023-04-01 00:05:52,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 5 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 00:05:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 3547 transitions. [2023-04-01 00:05:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 00:05:52,246 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:52,246 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:05:52,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:05:52,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:52,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:52,247 INFO L85 PathProgramCache]: Analyzing trace with hash 606395470, now seen corresponding path program 1 times [2023-04-01 00:05:52,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:52,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089755296] [2023-04-01 00:05:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:52,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 00:05:52,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:52,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089755296] [2023-04-01 00:05:52,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089755296] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:05:52,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907653914] [2023-04-01 00:05:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:52,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:52,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:05:52,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:05:52,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 00:05:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:52,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 00:05:52,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:05:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 00:05:52,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:05:52,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907653914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:52,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:05:52,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-04-01 00:05:52,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702018465] [2023-04-01 00:05:52,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:52,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:05:52,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:52,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:05:52,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:05:52,474 INFO L87 Difference]: Start difference. First operand 2729 states and 3547 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-01 00:05:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:52,818 INFO L93 Difference]: Finished difference Result 4385 states and 5704 transitions. [2023-04-01 00:05:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:05:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 90 [2023-04-01 00:05:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:52,830 INFO L225 Difference]: With dead ends: 4385 [2023-04-01 00:05:52,831 INFO L226 Difference]: Without dead ends: 2238 [2023-04-01 00:05:52,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:05:52,845 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 45 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:52,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 232 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:05:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2023-04-01 00:05:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2077. [2023-04-01 00:05:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 1380 states have (on average 1.132608695652174) internal successors, (1563), 1453 states have internal predecessors, (1563), 354 states have call successors, (354), 312 states have call predecessors, (354), 342 states have return successors, (482), 347 states have call predecessors, (482), 350 states have call successors, (482) [2023-04-01 00:05:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 2399 transitions. [2023-04-01 00:05:53,280 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 2399 transitions. Word has length 90 [2023-04-01 00:05:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:53,281 INFO L495 AbstractCegarLoop]: Abstraction has 2077 states and 2399 transitions. [2023-04-01 00:05:53,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-04-01 00:05:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 2399 transitions. [2023-04-01 00:05:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 00:05:53,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:53,284 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:05:53,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 00:05:53,490 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,SelfDestructingSolverStorable9 [2023-04-01 00:05:53,490 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:53,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash 677559566, now seen corresponding path program 1 times [2023-04-01 00:05:53,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:53,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768215019] [2023-04-01 00:05:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 00:05:53,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:53,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768215019] [2023-04-01 00:05:53,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768215019] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:05:53,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893621444] [2023-04-01 00:05:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:53,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:05:53,983 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:05:53,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 00:05:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:54,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 00:05:54,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:05:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 00:05:54,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:05:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893621444] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:54,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:05:54,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [17] total 20 [2023-04-01 00:05:54,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996155551] [2023-04-01 00:05:54,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:54,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:05:54,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:05:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:05:54,229 INFO L87 Difference]: Start difference. First operand 2077 states and 2399 transitions. Second operand has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 00:05:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:54,584 INFO L93 Difference]: Finished difference Result 3702 states and 4359 transitions. [2023-04-01 00:05:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 00:05:54,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 128 [2023-04-01 00:05:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:54,594 INFO L225 Difference]: With dead ends: 3702 [2023-04-01 00:05:54,595 INFO L226 Difference]: Without dead ends: 1642 [2023-04-01 00:05:54,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:05:54,601 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 41 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:54,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 477 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:05:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2023-04-01 00:05:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1394. [2023-04-01 00:05:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 959 states have (on average 1.1366006256517205) internal successors, (1090), 1015 states have internal predecessors, (1090), 223 states have call successors, (223), 195 states have call predecessors, (223), 211 states have return successors, (266), 214 states have call predecessors, (266), 219 states have call successors, (266) [2023-04-01 00:05:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1579 transitions. [2023-04-01 00:05:54,824 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1579 transitions. Word has length 128 [2023-04-01 00:05:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:54,824 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 1579 transitions. [2023-04-01 00:05:54,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (27), 3 states have call predecessors, (27), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-01 00:05:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1579 transitions. [2023-04-01 00:05:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 00:05:54,826 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:54,826 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:05:54,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 00:05:55,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:55,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:55,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1770206935, now seen corresponding path program 1 times [2023-04-01 00:05:55,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:55,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980560722] [2023-04-01 00:05:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:55,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 00:05:55,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:55,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980560722] [2023-04-01 00:05:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980560722] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:05:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461757478] [2023-04-01 00:05:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:55,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:55,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:05:55,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:05:55,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 00:05:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:55,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 00:05:55,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:05:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 00:05:55,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:05:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461757478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:55,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:05:55,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 00:05:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833138125] [2023-04-01 00:05:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:05:55,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:05:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:05:55,356 INFO L87 Difference]: Start difference. First operand 1394 states and 1579 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 00:05:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:55,714 INFO L93 Difference]: Finished difference Result 2299 states and 2607 transitions. [2023-04-01 00:05:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 00:05:55,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2023-04-01 00:05:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:55,722 INFO L225 Difference]: With dead ends: 2299 [2023-04-01 00:05:55,722 INFO L226 Difference]: Without dead ends: 1265 [2023-04-01 00:05:55,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:05:55,727 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 184 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:55,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 212 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:05:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2023-04-01 00:05:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1255. [2023-04-01 00:05:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 858 states have (on average 1.1351981351981353) internal successors, (974), 905 states have internal predecessors, (974), 202 states have call successors, (202), 182 states have call predecessors, (202), 194 states have return successors, (241), 192 states have call predecessors, (241), 198 states have call successors, (241) [2023-04-01 00:05:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1417 transitions. [2023-04-01 00:05:55,942 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1417 transitions. Word has length 139 [2023-04-01 00:05:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:55,943 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1417 transitions. [2023-04-01 00:05:55,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-01 00:05:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1417 transitions. [2023-04-01 00:05:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-01 00:05:55,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:55,946 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:05:55,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 00:05:56,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:56,153 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:56,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1447763250, now seen corresponding path program 1 times [2023-04-01 00:05:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568746933] [2023-04-01 00:05:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 00:05:56,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:56,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568746933] [2023-04-01 00:05:56,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568746933] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:05:56,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999724514] [2023-04-01 00:05:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:56,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:56,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:05:56,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:05:56,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 00:05:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:56,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 00:05:56,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:05:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 00:05:56,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:05:56,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999724514] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:56,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:05:56,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 22 [2023-04-01 00:05:56,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231145614] [2023-04-01 00:05:56,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:56,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:05:56,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:56,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:05:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:05:56,968 INFO L87 Difference]: Start difference. First operand 1255 states and 1417 transitions. Second operand has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 00:05:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:57,279 INFO L93 Difference]: Finished difference Result 1964 states and 2243 transitions. [2023-04-01 00:05:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 00:05:57,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2023-04-01 00:05:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:57,286 INFO L225 Difference]: With dead ends: 1964 [2023-04-01 00:05:57,286 INFO L226 Difference]: Without dead ends: 1065 [2023-04-01 00:05:57,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-04-01 00:05:57,290 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 60 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:57,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 603 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:05:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2023-04-01 00:05:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 943. [2023-04-01 00:05:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 642 states have (on average 1.132398753894081) internal successors, (727), 671 states have internal predecessors, (727), 156 states have call successors, (156), 141 states have call predecessors, (156), 144 states have return successors, (180), 148 states have call predecessors, (180), 152 states have call successors, (180) [2023-04-01 00:05:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1063 transitions. [2023-04-01 00:05:57,459 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1063 transitions. Word has length 142 [2023-04-01 00:05:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:57,459 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1063 transitions. [2023-04-01 00:05:57,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-01 00:05:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1063 transitions. [2023-04-01 00:05:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 00:05:57,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:57,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:05:57,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 00:05:57,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 00:05:57,669 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:57,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash 533517904, now seen corresponding path program 1 times [2023-04-01 00:05:57,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:57,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325068042] [2023-04-01 00:05:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:57,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 00:05:57,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:57,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325068042] [2023-04-01 00:05:57,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325068042] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:05:57,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647176977] [2023-04-01 00:05:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:57,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:57,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:05:57,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:05:57,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 00:05:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:58,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 00:05:58,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:05:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 00:05:58,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:05:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647176977] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:05:58,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:05:58,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 9 [2023-04-01 00:05:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884220537] [2023-04-01 00:05:58,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:05:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:05:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:05:58,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:05:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:05:58,152 INFO L87 Difference]: Start difference. First operand 943 states and 1063 transitions. Second operand has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 00:05:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:05:58,421 INFO L93 Difference]: Finished difference Result 2185 states and 2513 transitions. [2023-04-01 00:05:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 00:05:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 144 [2023-04-01 00:05:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:05:58,429 INFO L225 Difference]: With dead ends: 2185 [2023-04-01 00:05:58,429 INFO L226 Difference]: Without dead ends: 1402 [2023-04-01 00:05:58,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:05:58,433 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 57 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:05:58,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 614 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:05:58,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2023-04-01 00:05:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1351. [2023-04-01 00:05:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 890 states have (on average 1.1224719101123595) internal successors, (999), 927 states have internal predecessors, (999), 236 states have call successors, (236), 213 states have call predecessors, (236), 224 states have return successors, (294), 228 states have call predecessors, (294), 232 states have call successors, (294) [2023-04-01 00:05:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1529 transitions. [2023-04-01 00:05:58,633 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1529 transitions. Word has length 144 [2023-04-01 00:05:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:05:58,635 INFO L495 AbstractCegarLoop]: Abstraction has 1351 states and 1529 transitions. [2023-04-01 00:05:58,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-04-01 00:05:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1529 transitions. [2023-04-01 00:05:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 00:05:58,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:05:58,638 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:05:58,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 00:05:58,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:58,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:05:58,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:05:58,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1700093110, now seen corresponding path program 1 times [2023-04-01 00:05:58,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:05:58,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401453440] [2023-04-01 00:05:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:58,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:05:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 00:05:59,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:05:59,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401453440] [2023-04-01 00:05:59,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401453440] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:05:59,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000026945] [2023-04-01 00:05:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:05:59,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:05:59,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:05:59,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:05:59,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 00:05:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:05:59,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 89 conjunts are in the unsatisfiable core [2023-04-01 00:05:59,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:06:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 00:06:00,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 00:06:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 00:06:02,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000026945] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 00:06:02,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1050178042] [2023-04-01 00:06:02,365 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2023-04-01 00:06:02,366 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 00:06:02,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 00:06:02,367 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 00:06:02,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 00:06:02,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 58 for LOIs [2023-04-01 00:06:02,599 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 00:06:02,881 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 60 for LOIs [2023-04-01 00:06:02,897 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 74 for LOIs [2023-04-01 00:06:04,538 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 37 for LOIs [2023-04-01 00:06:04,546 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 54 for LOIs [2023-04-01 00:06:04,580 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 49 for LOIs [2023-04-01 00:06:04,950 INFO L197 IcfgInterpreter]: Interpreting procedure do_read_c with input of size 55 for LOIs [2023-04-01 00:06:05,021 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 35 for LOIs [2023-04-01 00:06:05,031 INFO L197 IcfgInterpreter]: Interpreting procedure do_write_p with input of size 52 for LOIs [2023-04-01 00:06:05,071 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 13 for LOIs [2023-04-01 00:06:05,085 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 39 for LOIs [2023-04-01 00:06:05,090 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 33 for LOIs [2023-04-01 00:06:05,095 INFO L197 IcfgInterpreter]: Interpreting procedure update_fifo_q with input of size 26 for LOIs [2023-04-01 00:06:05,100 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 13 for LOIs [2023-04-01 00:06:05,103 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 41 for LOIs [2023-04-01 00:06:05,173 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 37 for LOIs [2023-04-01 00:06:05,190 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 22 for LOIs [2023-04-01 00:06:05,205 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 00:06:10,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '92586#(and (= ~q_req_up~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~q_free~0 1) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~p_dw_i~0 1) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= |#NULL.base| 0))' at error location [2023-04-01 00:06:10,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 00:06:10,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 00:06:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 21] total 57 [2023-04-01 00:06:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540943015] [2023-04-01 00:06:10,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 00:06:10,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-04-01 00:06:10,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:06:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-04-01 00:06:10,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1068, Invalid=12738, Unknown=0, NotChecked=0, Total=13806 [2023-04-01 00:06:10,560 INFO L87 Difference]: Start difference. First operand 1351 states and 1529 transitions. Second operand has 57 states, 47 states have (on average 4.638297872340425) internal successors, (218), 50 states have internal predecessors, (218), 26 states have call successors, (72), 25 states have call predecessors, (72), 32 states have return successors, (66), 29 states have call predecessors, (66), 26 states have call successors, (66)