/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 EqDomain -i ../sv-benchmarks/c/systemc/pc_sfifo_2.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:15:46,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:15:46,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:15:46,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:15:46,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:15:46,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:15:46,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:15:46,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:15:46,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:15:46,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:15:46,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:15:46,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:15:46,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:15:46,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:15:46,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:15:46,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:15:46,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:15:46,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:15:46,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:15:46,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:15:46,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:15:46,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:15:46,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:15:46,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:15:46,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:15:46,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:15:46,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:15:46,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:15:46,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:15:46,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:15:46,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:15:46,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:15:46,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:15:46,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:15:46,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:15:46,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:15:46,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:15:46,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:15:46,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:15:46,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:15:46,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:15:46,939 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 12:15:46,961 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:15:46,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:15:46,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:15:46,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:15:46,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:15:46,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:15:46,962 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:15:46,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:15:46,963 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:15:46,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:15:46,963 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:15:46,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:15:46,963 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:15:46,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:15:46,964 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:15:46,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:15:46,964 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:15:46,964 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:15:46,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:15:46,964 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:15:46,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:15:46,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:15:46,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:15:46,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:15:46,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:15:47,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:15:47,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:15:47,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:15:47,189 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:15:47,189 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:15:47,190 INFO L432 ainManager$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 12:15:48,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:15:48,315 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:15:48,316 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/pc_sfifo_2.cil-1.c [2023-04-01 12:15:48,321 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40deaa937/87bf1aa95382471795cf789c9a4f3bcc/FLAGc3fbb6def [2023-04-01 12:15:48,331 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40deaa937/87bf1aa95382471795cf789c9a4f3bcc [2023-04-01 12:15:48,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:15:48,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:15:48,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:15:48,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:15:48,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:15:48,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f28f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48, skipping insertion in model container [2023-04-01 12:15:48,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:15:48,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:15:48,443 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 12:15:48,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:15:48,505 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:15:48,512 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 12:15:48,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:15:48,547 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:15:48,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48 WrapperNode [2023-04-01 12:15:48,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:15:48,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:15:48,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:15:48,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:15:48,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,572 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:15:48,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:15:48,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:15:48,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:15:48,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (1/1) ... [2023-04-01 12:15:48,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:15:48,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:15:48,599 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 12:15:48,609 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 12:15:48,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:15:48,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:15:48,632 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:15:48,632 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-04-01 12:15:48,636 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2023-04-01 12:15:48,636 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-04-01 12:15:48,636 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-04-01 12:15:48,636 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-04-01 12:15:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2023-04-01 12:15:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2023-04-01 12:15:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-04-01 12:15:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2023-04-01 12:15:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-04-01 12:15:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-04-01 12:15:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-04-01 12:15:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-04-01 12:15:48,638 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-01 12:15:48,638 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2023-04-01 12:15:48,638 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-04-01 12:15:48,638 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2023-04-01 12:15:48,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:15:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:15:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:15:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:15:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:15:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:15:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-04-01 12:15:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2023-04-01 12:15:48,640 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-04-01 12:15:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2023-04-01 12:15:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:15:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:15:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:15:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:15:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:15:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:15:48,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:15:48,723 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:15:48,726 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:15:49,024 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:15:49,135 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:15:49,135 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 12:15:49,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:15:49 BoogieIcfgContainer [2023-04-01 12:15:49,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:15:49,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:15:49,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:15:49,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:15:49,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:15:48" (1/3) ... [2023-04-01 12:15:49,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397e6527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:15:49, skipping insertion in model container [2023-04-01 12:15:49,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:15:48" (2/3) ... [2023-04-01 12:15:49,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397e6527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:15:49, skipping insertion in model container [2023-04-01 12:15:49,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:15:49" (3/3) ... [2023-04-01 12:15:49,144 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1.c [2023-04-01 12:15:49,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:15:49,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:15:49,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:15:49,196 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;@2bbf965d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:15:49,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:15:49,199 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 12:15:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:15:49,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:15:49,207 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 12:15:49,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:15:49,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:15:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1684028879, now seen corresponding path program 1 times [2023-04-01 12:15:49,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:15:49,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838248543] [2023-04-01 12:15:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:15:49,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:15:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:15:49,730 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 12:15:49,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:15:49,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838248543] [2023-04-01 12:15:49,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838248543] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:15:49,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:15:49,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:15:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680307976] [2023-04-01 12:15:49,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:15:49,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:15:49,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:15:49,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:15:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:15:49,776 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 12:15:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:15:50,981 INFO L93 Difference]: Finished difference Result 593 states and 871 transitions. [2023-04-01 12:15:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 12:15:50,984 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 12:15:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:15:50,993 INFO L225 Difference]: With dead ends: 593 [2023-04-01 12:15:50,993 INFO L226 Difference]: Without dead ends: 473 [2023-04-01 12:15:50,997 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 12:15:51,000 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 12:15:51,000 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 12:15:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-01 12:15:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 421. [2023-04-01 12:15:51,092 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 12:15:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 549 transitions. [2023-04-01 12:15:51,096 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 549 transitions. Word has length 60 [2023-04-01 12:15:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:15:51,096 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 549 transitions. [2023-04-01 12:15:51,101 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 12:15:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 549 transitions. [2023-04-01 12:15:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:15:51,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:15:51,103 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 12:15:51,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:15:51,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:15:51,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:15:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash -80787730, now seen corresponding path program 1 times [2023-04-01 12:15:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:15:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066407275] [2023-04-01 12:15:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:15:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:15:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:15:51,316 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 12:15:51,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:15:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066407275] [2023-04-01 12:15:51,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066407275] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:15:51,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:15:51,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:15:51,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999371036] [2023-04-01 12:15:51,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:15:51,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:15:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:15:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:15:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:15:51,320 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 12:15:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:15:52,091 INFO L93 Difference]: Finished difference Result 1263 states and 1750 transitions. [2023-04-01 12:15:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 12:15:52,092 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 12:15:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:15:52,097 INFO L225 Difference]: With dead ends: 1263 [2023-04-01 12:15:52,098 INFO L226 Difference]: Without dead ends: 858 [2023-04-01 12:15:52,100 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 12:15:52,101 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1118 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:15:52,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 683 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:15:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2023-04-01 12:15:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 726. [2023-04-01 12:15:52,163 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 12:15:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 922 transitions. [2023-04-01 12:15:52,167 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 922 transitions. Word has length 60 [2023-04-01 12:15:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:15:52,168 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 922 transitions. [2023-04-01 12:15:52,168 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 12:15:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 922 transitions. [2023-04-01 12:15:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 12:15:52,169 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:15:52,169 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 12:15:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:15:52,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:15:52,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:15:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1846265183, now seen corresponding path program 1 times [2023-04-01 12:15:52,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:15:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638546976] [2023-04-01 12:15:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:15:52,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:15:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:15:52,321 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 12:15:52,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:15:52,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638546976] [2023-04-01 12:15:52,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638546976] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:15:52,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:15:52,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:15:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528144592] [2023-04-01 12:15:52,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:15:52,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:15:52,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:15:52,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:15:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:15:52,325 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 12:15:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:15:52,747 INFO L93 Difference]: Finished difference Result 2047 states and 2778 transitions. [2023-04-01 12:15:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:15:52,747 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 12:15:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:15:52,755 INFO L225 Difference]: With dead ends: 2047 [2023-04-01 12:15:52,755 INFO L226 Difference]: Without dead ends: 1338 [2023-04-01 12:15:52,760 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 12:15:52,762 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 369 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:15:52,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 275 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:15:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2023-04-01 12:15:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1248. [2023-04-01 12:15:52,860 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 12:15:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1640 transitions. [2023-04-01 12:15:52,866 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1640 transitions. Word has length 61 [2023-04-01 12:15:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:15:52,867 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 1640 transitions. [2023-04-01 12:15:52,867 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 12:15:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1640 transitions. [2023-04-01 12:15:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:15:52,872 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:15:52,872 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 12:15:52,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:15:52,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:15:52,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:15:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1239971941, now seen corresponding path program 1 times [2023-04-01 12:15:52,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:15:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653643628] [2023-04-01 12:15:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:15:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:15:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:15:52,965 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 12:15:52,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:15:52,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653643628] [2023-04-01 12:15:52,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653643628] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:15:52,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:15:52,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:15:52,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636807463] [2023-04-01 12:15:52,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:15:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:15:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:15:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:15:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:15:52,967 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 12:15:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:15:53,088 INFO L93 Difference]: Finished difference Result 2278 states and 3063 transitions. [2023-04-01 12:15:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:15:53,088 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 12:15:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:15:53,094 INFO L225 Difference]: With dead ends: 2278 [2023-04-01 12:15:53,095 INFO L226 Difference]: Without dead ends: 1274 [2023-04-01 12:15:53,098 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 12:15:53,103 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 12:15:53,104 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 12:15:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2023-04-01 12:15:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1201. [2023-04-01 12:15:53,171 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 12:15:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1546 transitions. [2023-04-01 12:15:53,177 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1546 transitions. Word has length 62 [2023-04-01 12:15:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:15:53,178 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1546 transitions. [2023-04-01 12:15:53,178 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 12:15:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1546 transitions. [2023-04-01 12:15:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 12:15:53,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:15:53,179 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 12:15:53,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:15:53,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:15:53,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:15:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1747233106, now seen corresponding path program 1 times [2023-04-01 12:15:53,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:15:53,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41560346] [2023-04-01 12:15:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:15:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:15:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:15:53,260 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 12:15:53,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:15:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41560346] [2023-04-01 12:15:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41560346] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:15:53,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:15:53,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:15:53,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340524855] [2023-04-01 12:15:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:15:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:15:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:15:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:15:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:15:53,262 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 12:15:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:15:53,433 INFO L93 Difference]: Finished difference Result 1404 states and 1810 transitions. [2023-04-01 12:15:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:15:53,433 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 12:15:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:15:53,440 INFO L225 Difference]: With dead ends: 1404 [2023-04-01 12:15:53,440 INFO L226 Difference]: Without dead ends: 1401 [2023-04-01 12:15:53,443 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 12:15:53,443 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 12:15:53,443 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 12:15:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2023-04-01 12:15:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1238. [2023-04-01 12:15:53,522 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 12:15:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1578 transitions. [2023-04-01 12:15:53,528 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1578 transitions. Word has length 71 [2023-04-01 12:15:53,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:15:53,529 INFO L495 AbstractCegarLoop]: Abstraction has 1238 states and 1578 transitions. [2023-04-01 12:15:53,529 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 12:15:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1578 transitions. [2023-04-01 12:15:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 12:15:53,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:15:53,530 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 12:15:53,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:15:53,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:15:53,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:15:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1670665561, now seen corresponding path program 1 times [2023-04-01 12:15:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:15:53,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526491133] [2023-04-01 12:15:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:15:53,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:15:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:15:53,840 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 12:15:53,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:15:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526491133] [2023-04-01 12:15:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526491133] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:15:53,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756183413] [2023-04-01 12:15:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:15:53,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:15:53,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:15:53,844 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 12:15:53,883 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 12:15:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:15:53,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 12:15:53,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:15:54,307 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 12:15:54,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:15:54,553 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 12:15:54,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756183413] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:15:54,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [232132507] [2023-04-01 12:15:54,591 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2023-04-01 12:15:54,591 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:15:54,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:15:54,599 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:15:54,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:15:54,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 58 for LOIs [2023-04-01 12:15:54,998 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 111 for LOIs [2023-04-01 12:15:55,733 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 95 for LOIs [2023-04-01 12:15:55,785 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 107 for LOIs [2023-04-01 12:15:57,678 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 78 for LOIs [2023-04-01 12:15:57,699 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 85 for LOIs [2023-04-01 12:15:57,731 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 100 for LOIs [2023-04-01 12:15:58,371 INFO L197 IcfgInterpreter]: Interpreting procedure do_read_c with input of size 94 for LOIs [2023-04-01 12:15:58,495 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 87 for LOIs [2023-04-01 12:15:58,503 INFO L197 IcfgInterpreter]: Interpreting procedure do_write_p with input of size 100 for LOIs [2023-04-01 12:15:58,748 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 76 for LOIs [2023-04-01 12:15:58,758 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 78 for LOIs [2023-04-01 12:15:58,770 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 74 for LOIs [2023-04-01 12:15:58,782 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 82 for LOIs [2023-04-01 12:15:59,006 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 78 for LOIs [2023-04-01 12:15:59,035 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 78 for LOIs [2023-04-01 12:15:59,063 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 12:16:07,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18848#(and (= ~q_req_up~0 1) (= (select |#length| 3) 12) (not (= ~q_read_ev~0 1)) (not (= ~p_num_write~0 1)) (= ~q_free~0 1) (= 1 ~c_dr_i~0) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= ~c_num_read~0 1) (= ~p_dw_pc~0 1) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= ~c_last_read~0 ~q_buf_0~0) (= 19 (select |#length| 2)) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~p_dw_i~0 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (not (= ~q_write_ev~0 1)) (= ~a_t~0 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= ~c_dr_st~0 1) (= |#NULL.base| 0))' at error location [2023-04-01 12:16:07,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 12:16:07,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:16:07,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-04-01 12:16:07,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548548403] [2023-04-01 12:16:07,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 12:16:07,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 12:16:07,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 12:16:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=3499, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 12:16:07,032 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 12:16:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:08,643 INFO L93 Difference]: Finished difference Result 4016 states and 5916 transitions. [2023-04-01 12:16:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:16:08,644 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 12:16:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:08,663 INFO L225 Difference]: With dead ends: 4016 [2023-04-01 12:16:08,663 INFO L226 Difference]: Without dead ends: 3607 [2023-04-01 12:16:08,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2839 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=656, Invalid=5824, Unknown=0, NotChecked=0, Total=6480 [2023-04-01 12:16:08,671 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 988 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 12:16:08,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1003 Valid, 898 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 12:16:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3607 states. [2023-04-01 12:16:09,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3607 to 3239. [2023-04-01 12:16:09,007 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 12:16:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 4583 transitions. [2023-04-01 12:16:09,025 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 4583 transitions. Word has length 72 [2023-04-01 12:16:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:09,025 INFO L495 AbstractCegarLoop]: Abstraction has 3239 states and 4583 transitions. [2023-04-01 12:16:09,025 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 12:16:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 4583 transitions. [2023-04-01 12:16:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 12:16:09,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:09,026 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 12:16:09,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 12:16:09,233 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 12:16:09,233 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:09,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:09,234 INFO L85 PathProgramCache]: Analyzing trace with hash 917574233, now seen corresponding path program 2 times [2023-04-01 12:16:09,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:09,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280107148] [2023-04-01 12:16:09,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:09,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:09,312 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 12:16:09,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280107148] [2023-04-01 12:16:09,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280107148] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:16:09,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:16:09,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:16:09,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554691447] [2023-04-01 12:16:09,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:16:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:16:09,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:16:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:16:09,315 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 12:16:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:09,524 INFO L93 Difference]: Finished difference Result 4689 states and 6767 transitions. [2023-04-01 12:16:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:16:09,525 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 12:16:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:09,535 INFO L225 Difference]: With dead ends: 4689 [2023-04-01 12:16:09,535 INFO L226 Difference]: Without dead ends: 2195 [2023-04-01 12:16:09,547 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 12:16:09,548 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 12:16:09,548 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 12:16:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2023-04-01 12:16:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1973. [2023-04-01 12:16:09,711 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 12:16:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2647 transitions. [2023-04-01 12:16:09,720 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2647 transitions. Word has length 75 [2023-04-01 12:16:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:09,720 INFO L495 AbstractCegarLoop]: Abstraction has 1973 states and 2647 transitions. [2023-04-01 12:16:09,720 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 12:16:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2647 transitions. [2023-04-01 12:16:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 12:16:09,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:09,724 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 12:16:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:16:09,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:09,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1825750021, now seen corresponding path program 1 times [2023-04-01 12:16:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:09,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502706550] [2023-04-01 12:16:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:09,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:09,789 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 12:16:09,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502706550] [2023-04-01 12:16:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502706550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:16:09,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:16:09,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:16:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678119921] [2023-04-01 12:16:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:16:09,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:16:09,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:16:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:16:09,792 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 12:16:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:10,022 INFO L93 Difference]: Finished difference Result 3541 states and 4833 transitions. [2023-04-01 12:16:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:16:10,023 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 12:16:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:10,031 INFO L225 Difference]: With dead ends: 3541 [2023-04-01 12:16:10,032 INFO L226 Difference]: Without dead ends: 2283 [2023-04-01 12:16:10,037 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 12:16:10,039 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 12:16:10,039 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 12:16:10,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2023-04-01 12:16:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2029. [2023-04-01 12:16:10,203 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 12:16:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 2615 transitions. [2023-04-01 12:16:10,211 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 2615 transitions. Word has length 79 [2023-04-01 12:16:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:10,212 INFO L495 AbstractCegarLoop]: Abstraction has 2029 states and 2615 transitions. [2023-04-01 12:16:10,212 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 12:16:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 2615 transitions. [2023-04-01 12:16:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 12:16:10,215 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:10,215 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 12:16:10,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:16:10,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:10,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:10,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2133015377, now seen corresponding path program 1 times [2023-04-01 12:16:10,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976578094] [2023-04-01 12:16:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:10,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:10,360 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 12:16:10,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:10,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976578094] [2023-04-01 12:16:10,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976578094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:16:10,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:16:10,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:16:10,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008830853] [2023-04-01 12:16:10,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:16:10,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:16:10,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:16:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:16:10,362 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 12:16:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:10,957 INFO L93 Difference]: Finished difference Result 4804 states and 6668 transitions. [2023-04-01 12:16:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:16:10,957 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 12:16:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:10,975 INFO L225 Difference]: With dead ends: 4804 [2023-04-01 12:16:10,975 INFO L226 Difference]: Without dead ends: 2792 [2023-04-01 12:16:10,986 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 12:16:10,988 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 275 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:16:10,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 326 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:16:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2023-04-01 12:16:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2729. [2023-04-01 12:16:11,249 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 12:16:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 3547 transitions. [2023-04-01 12:16:11,261 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 3547 transitions. Word has length 89 [2023-04-01 12:16:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:11,262 INFO L495 AbstractCegarLoop]: Abstraction has 2729 states and 3547 transitions. [2023-04-01 12:16:11,262 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 12:16:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 3547 transitions. [2023-04-01 12:16:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 12:16:11,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:11,267 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 12:16:11,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:16:11,267 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:11,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash 606395470, now seen corresponding path program 1 times [2023-04-01 12:16:11,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:11,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869658174] [2023-04-01 12:16:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:11,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:11,321 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 12:16:11,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:11,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869658174] [2023-04-01 12:16:11,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869658174] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:16:11,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684269023] [2023-04-01 12:16:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:11,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:16:11,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:16:11,323 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 12:16:11,330 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 12:16:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:11,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 12:16:11,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:16:11,478 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 12:16:11,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:16:11,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684269023] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:16:11,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:16:11,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-04-01 12:16:11,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291494738] [2023-04-01 12:16:11,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:16:11,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:16:11,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:16:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:16:11,481 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 12:16:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:11,740 INFO L93 Difference]: Finished difference Result 4385 states and 5704 transitions. [2023-04-01 12:16:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:16:11,741 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 12:16:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:11,750 INFO L225 Difference]: With dead ends: 4385 [2023-04-01 12:16:11,750 INFO L226 Difference]: Without dead ends: 2238 [2023-04-01 12:16:11,759 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 12:16:11,760 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 12:16:11,761 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 12:16:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2023-04-01 12:16:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2077. [2023-04-01 12:16:11,965 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 12:16:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 2399 transitions. [2023-04-01 12:16:11,973 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 2399 transitions. Word has length 90 [2023-04-01 12:16:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:11,973 INFO L495 AbstractCegarLoop]: Abstraction has 2077 states and 2399 transitions. [2023-04-01 12:16:11,973 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 12:16:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 2399 transitions. [2023-04-01 12:16:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 12:16:11,976 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:11,976 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 12:16:11,984 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 12:16:12,182 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 12:16:12,182 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:12,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash 677559566, now seen corresponding path program 1 times [2023-04-01 12:16:12,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:12,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075439827] [2023-04-01 12:16:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:12,557 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 12:16:12,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:12,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075439827] [2023-04-01 12:16:12,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075439827] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:16:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422793446] [2023-04-01 12:16:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:12,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:16:12,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:16:12,559 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 12:16:12,561 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 12:16:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:12,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 12:16:12,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:16:12,737 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 12:16:12,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:16:12,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422793446] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:16:12,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:16:12,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [17] total 20 [2023-04-01 12:16:12,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070013705] [2023-04-01 12:16:12,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:16:12,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:16:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:12,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:16:12,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:16:12,739 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 12:16:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:12,965 INFO L93 Difference]: Finished difference Result 3702 states and 4359 transitions. [2023-04-01 12:16:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:16:12,966 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 12:16:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:12,973 INFO L225 Difference]: With dead ends: 3702 [2023-04-01 12:16:12,973 INFO L226 Difference]: Without dead ends: 1642 [2023-04-01 12:16:12,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2023-04-01 12:16:12,979 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 41 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:16:12,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 553 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:16:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2023-04-01 12:16:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1394. [2023-04-01 12:16:13,126 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 12:16:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1579 transitions. [2023-04-01 12:16:13,130 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1579 transitions. Word has length 128 [2023-04-01 12:16:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:13,130 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 1579 transitions. [2023-04-01 12:16:13,130 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 12:16:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1579 transitions. [2023-04-01 12:16:13,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 12:16:13,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:13,132 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 12:16:13,138 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 12:16:13,338 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 12:16:13,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:13,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1770206935, now seen corresponding path program 1 times [2023-04-01 12:16:13,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:13,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805203812] [2023-04-01 12:16:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:13,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:13,411 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 12:16:13,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:13,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805203812] [2023-04-01 12:16:13,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805203812] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:16:13,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68989829] [2023-04-01 12:16:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:13,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:16:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:16:13,412 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 12:16:13,414 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 12:16:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:13,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 12:16:13,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:16:13,604 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 12:16:13,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:16:13,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68989829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:16:13,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:16:13,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-01 12:16:13,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335267032] [2023-04-01 12:16:13,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:16:13,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:16:13,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:16:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:16:13,607 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 12:16:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:13,891 INFO L93 Difference]: Finished difference Result 2299 states and 2607 transitions. [2023-04-01 12:16:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:16:13,891 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 12:16:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:13,895 INFO L225 Difference]: With dead ends: 2299 [2023-04-01 12:16:13,895 INFO L226 Difference]: Without dead ends: 1265 [2023-04-01 12:16:13,897 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 12:16:13,898 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 143 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:16:13,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 235 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:16:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2023-04-01 12:16:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1255. [2023-04-01 12:16:14,029 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 12:16:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1417 transitions. [2023-04-01 12:16:14,033 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1417 transitions. Word has length 139 [2023-04-01 12:16:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:14,034 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1417 transitions. [2023-04-01 12:16:14,035 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 12:16:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1417 transitions. [2023-04-01 12:16:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-04-01 12:16:14,037 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:14,037 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 12:16:14,043 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 12:16:14,243 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 12:16:14,243 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:14,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:14,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1447763250, now seen corresponding path program 1 times [2023-04-01 12:16:14,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:14,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124299138] [2023-04-01 12:16:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:14,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:14,628 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 12:16:14,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124299138] [2023-04-01 12:16:14,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124299138] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:16:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941170576] [2023-04-01 12:16:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:14,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:16:14,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:16:14,641 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 12:16:14,668 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 12:16:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:14,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 12:16:14,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:16:14,868 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 12:16:14,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:16:14,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941170576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:16:14,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:16:14,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 22 [2023-04-01 12:16:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325252393] [2023-04-01 12:16:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:16:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:16:14,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:16:14,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:16:14,871 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 12:16:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:15,121 INFO L93 Difference]: Finished difference Result 1964 states and 2243 transitions. [2023-04-01 12:16:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:16:15,122 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 12:16:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:15,126 INFO L225 Difference]: With dead ends: 1964 [2023-04-01 12:16:15,126 INFO L226 Difference]: Without dead ends: 1065 [2023-04-01 12:16:15,128 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 12:16:15,129 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 63 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:16:15,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 549 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:16:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2023-04-01 12:16:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 943. [2023-04-01 12:16:15,239 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 12:16:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1063 transitions. [2023-04-01 12:16:15,241 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1063 transitions. Word has length 142 [2023-04-01 12:16:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:15,241 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1063 transitions. [2023-04-01 12:16:15,241 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 12:16:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1063 transitions. [2023-04-01 12:16:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 12:16:15,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:15,242 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 12:16:15,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 12:16:15,448 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 12:16:15,449 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:15,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 533517904, now seen corresponding path program 1 times [2023-04-01 12:16:15,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:15,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184260961] [2023-04-01 12:16:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:15,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:15,656 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 12:16:15,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:15,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184260961] [2023-04-01 12:16:15,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184260961] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:16:15,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418994506] [2023-04-01 12:16:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:15,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:16:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:16:15,668 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 12:16:15,693 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 12:16:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:15,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 12:16:15,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:16:15,859 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 12:16:15,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:16:15,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418994506] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:16:15,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:16:15,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 9 [2023-04-01 12:16:15,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137018658] [2023-04-01 12:16:15,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:16:15,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:16:15,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:16:15,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:16:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:16:15,861 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 12:16:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:16:16,063 INFO L93 Difference]: Finished difference Result 2185 states and 2513 transitions. [2023-04-01 12:16:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:16:16,063 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 12:16:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:16:16,069 INFO L225 Difference]: With dead ends: 2185 [2023-04-01 12:16:16,070 INFO L226 Difference]: Without dead ends: 1402 [2023-04-01 12:16:16,072 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 12:16:16,072 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:16:16,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 614 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:16:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2023-04-01 12:16:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1351. [2023-04-01 12:16:16,238 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 12:16:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1529 transitions. [2023-04-01 12:16:16,241 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1529 transitions. Word has length 144 [2023-04-01 12:16:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:16:16,241 INFO L495 AbstractCegarLoop]: Abstraction has 1351 states and 1529 transitions. [2023-04-01 12:16:16,241 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 12:16:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1529 transitions. [2023-04-01 12:16:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 12:16:16,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:16:16,243 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 12:16:16,264 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 12:16:16,453 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 12:16:16,453 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:16:16,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:16:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1700093110, now seen corresponding path program 1 times [2023-04-01 12:16:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:16:16,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289867241] [2023-04-01 12:16:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:16:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:16,998 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 12:16:16,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:16:16,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289867241] [2023-04-01 12:16:16,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289867241] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:16:16,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814928435] [2023-04-01 12:16:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:16:16,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:16:16,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:16:17,009 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 12:16:17,011 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 12:16:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:16:17,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 89 conjunts are in the unsatisfiable core [2023-04-01 12:16:17,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:16:17,848 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 12:16:17,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:16:19,146 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 12:16:19,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814928435] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:16:19,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024733309] [2023-04-01 12:16:19,150 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2023-04-01 12:16:19,150 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:16:19,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:16:19,151 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:16:19,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:16:19,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 58 for LOIs [2023-04-01 12:16:19,310 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 111 for LOIs [2023-04-01 12:16:19,705 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 95 for LOIs [2023-04-01 12:16:19,723 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 107 for LOIs [2023-04-01 12:16:20,664 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 12:16:22,951 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 12:16:23,659 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 80 for LOIs [2023-04-01 12:16:23,680 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 95 for LOIs [2023-04-01 12:16:23,962 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 102 for LOIs [2023-04-01 12:16:24,878 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 12:16:25,820 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 12:16:26,032 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 12:16:26,482 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 12:16:27,665 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-04-01 12:16:28,061 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2023-04-01 12:16:29,324 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2023-04-01 12:16:30,441 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2023-04-01 12:16:30,769 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 12:16:30,935 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 12:16:31,207 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-01 12:16:31,409 INFO L197 IcfgInterpreter]: Interpreting procedure do_read_c with input of size 94 for LOIs [2023-04-01 12:16:32,239 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-04-01 12:16:34,056 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-04-01 12:16:35,641 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17